warning lights MERCEDES-BENZ GLE COUPE 2015 Owners Manual

1, 2, 3 ...
4ETS (Electronic Traction System) see ETS/4ETS (Electronic Trac-
tion System)
4MATIC (permanent four-wheel
drive) .................................................. 193
12 V socket
see Sockets
360° camera
Cleaning .........................................3 28
Display in the multimedia system .. 212
Function/notes ............................ .210 A
ABS (Anti-lock Braking System) Display message ............................ 254
Function/notes ................................ 64
Important safety notes .................... 64
Warning lamp ................................. 289
Accident
Automatic measures after an acci-
dent ................................................. 52
Activating/deactivating air-recir-
culation mode ................................... .136
Activating/deactivating cooling
with air dehumidification ................. 130
Active Blind Spot Assist
Activating/deactivating (on-
board computer) ............................ 245
Display message ............................ 275
Function/notes ............................ .221
Towing a trailer .............................. 224
Active Curve System
Display message ............................ 273
Function/notes ............................ .196
Active Driving Assistance package .. 221
Active Lane Keeping Assist
Activating/deactivating (on-
board computer) ............................ 245
Display message ............................ 274
Function/notes ............................ .224
Towing a trailer .............................. 226
Active light function ......................... 118
Active Parking Assist
Display message ............................ 275
Exiting a parking space .................. 205 Function/notes ............................
.202
Important safety notes .................. 202
Parking .......................................... 204
ADAPTIVE BRAKE ................................. 72
Adaptive Brake Assist
Function/notes ................................ 68
Adaptive brake lights .......................... 69
Adaptive Damping System
Function/notes ............................ .198
Adaptive Highbeam Assist Plus
Display message ............................ 268
Function/notes ............................ .119
Switching on/off ........................... 120
AdBlue ®
Display message ............................ 271
Filling capacity ............................... 378
Important safety notes .................. 377
Topping up ..................................... 164
Additives (engine oil) ........................ 379
ADS (Adaptive Damping System)
Function/notes ............................ .195
Air conditioning
General notes ................................ 126
Air filter (white display message) .... 271
AIR FLOW .......................................... .132
Air vents
Glove compartment ....................... 143
Important safety notes .................. 142
Rear ............................................... 143
Setting .......................................... .142
Setting the centre air vents ........... 143
Setting the side air vents .............. .143
Air-conditioning system
see Climate control
Airbag
Automatic front-passenger front
airbag deactivatio n .......................... 45
Introduction ..................................... 42
PASSENGER AIR BAG indicator
lamps ............................................... 38
Airbags
Display message ............................ 264
Front airbag (driver, front
passenger) ....................................... 43
Important safety guidelines ............. 42
Kneebag .......................................... .44
Sidebag ............................................ 44 Index
3

Convenience closing feature
.............. 94
Convenience opening feature ............ 93
Convenience opening/closing (air-
recirculation mode) ...........................136
Coolant (engine)
Checking the level ......................... 321
Display message ............................ 269
Important safety notes .................. 380
Temperature (on-board computer, Mercedes-AMG vehicles) .............. .250
Temperature gauge ........................ 236
Warning lamp ................................. 295
Cooling
see Climate control
Copyright ............................................. 26
Cornering light function
Display message ............................ 266
Function/notes ............................ .118
Crash-responsive emergency light-
ing ....................................................... 121
Crosswind Assist ................................. 72
Cruise control
Activating ....................................... 179
Activation conditions ..................... 179
Cruise control lever ....................... 179
Deactivating ................................... 180
Display message ............................ 277
Driving system ............................... 178
Important safety notes .................. 179
LIM indicator lamp ......................... 179
Selecting ........................................ 179
Storing and maintaining current
speed ............................................. 179
Cup holder
Centre console .............................. 307
Important safety notes .................. 306
Rear compartment ......................... 307
Temperature controlled ................. 307 D
Data see Technical data
Data carrier
Selecting ........................................ 241
Daytime driving lights
Display message ............................ 267
Function/notes ............................ .115 Declarations of conformity
................. 24
Diagnostics connection ......................24
Digital speedometer .........................239
Dipped-beam headlamps
Display message ............................ 266
Setting for driving abroad (sym-
metrical) ........................................ 115
Setting for driving on the right/
left ................................................. 246
Switching on/off ........................... 116
DIRECT SELECT lever
Automatic transmission ................. 154
Display message
Driving systems ............................ .272
KEYLESS-GO .................................. 285
Display messages
ASSYST PLUS ................................ 322
Calling up (on-board computer) ..... 253
Engine ............................................ 269
General information ....................... 253
Hiding (on-board computer) ........... 253
Key ................................................ 285
Lights ............................................. 266
Safety systems .............................. 254
Tyres .............................................. 279
Vehicle .......................................... .281
Distance warning function
Function/notes ................................ 67
Warning lamp ................................. 297
Distance warning signal (warning
lamp) ................................................. .297
DISTRONIC PLUS
Activating ....................................... 184
Activation conditions ..................... 184
Cruise control lever ....................... 184
Deactivating ................................... 187
Display message ............................ 276
Displays in the multifunction dis-
play ................................................ 188
Driving tips ................................... .188
Function/notes ............................ .182
Important safety notes .................. 183
Selecting ........................................ 184
Setting the specified minimum
distance ......................................... 187
Stopping ........................................ 186
Warning lamp ................................. 297 Index
7

Door
Automatic locking (on-board com-
puter) ............................................ .247
Automatic locking (switch) .............. .86
Central locking/unlocking (key) ...... 79
Control panel .................................. .36
Display message ............................ 283
Emergency locking ........................... 87
Emergency unlocking ....................... 86
Important safety note s.................... 84
Opening (from the inside) ................ 85
Power closing .................................. 86
Doors
Overview .......................................... 84
Drive program
Display (DIRECT SELECT lever) ...... 154
Drive programs
Automatic transmission ................. 158
Driver's door
see Door
Driving abroad
Mercedes-Benz Service ................. 323
Symmetrical dipped beam ............. 115
Driving assistance, crosswind ........... 72
Driving in mountainous terrain
Approach/departure angle ............ 177
Driving off-road
see Off-road driving
Driving safety system
BAS PLUS with Cross-Traffic
Assist ............................................... 65
COLLISION PREVENTION ASSIST
PLUS ................................................ 67
EBD (electronic brake force distri-bution) ............................................. 72
STEER CONTROL ............................. 74
Driving safety systems
ABS (Anti-lock Braking System) ....... 64
ADAPTIVE BRAK E............................. 72
Adaptive Brake Assist ...................... 68
Adaptive brake lights ....................... 69
BAS (Brake Assist System) .............. 65
Distance warning function ............... 67
ESP ®
(Electronic Stability Pro-
gram) ............................................... 69
Important safety guidelines ............. 64
Overview .......................................... 64 PRE-SAFE
®
Brake ............................. 72
Driving system
ADS ............................................... 195
AIRMATIC package ........................ 194
DISTRONIC PLUS with Steering
Assist and Stop&Go Pilot ............... 190
Driving systems
360°camera .................................. 210
Active Blind Spot Assist ................. 221
Active Curve System ...................... 196
Active Driving Assistance pack-
age ................................................. 221
Active Lane Keeping Assist ............ 224
Active Parking Assist ..................... 202
AMG RIDE CONTROL sports sus-
pension .......................................... 198
ATTENTION ASSIST ........................ 214
Blind Spot Assist ............................ 218
Cruise control ................................ 178
Display message ............................ 272
Distronic Plus ................................ 182
HOLD function ............................... 191
Lane Keeping Assist ...................... 220
PARKTRONIC ................................. 199
Reversing camera .......................... 206
SPEEDTRONIC ............................... 180
Traffic Sign Assist .......................... 216
Driving tips
Aquaplaning ................................... 173
Automatic transmission ................. 156
Brakes ........................................... 172
DISTRONIC PLUS ........................... 188
Downhill gradient ........................... 172
Driving abroad ............................... 115
Driving in winter ............................. 174
Driving on flooded roads ................ 174
Driving on sand .............................. 177
Driving on wet roads ...................... 173
Driving over obstacles ................... 177
Fuel ................................................ 171
General .......................................... 171
Icy road surfaces ........................... 174
Limited braking efficiency on sal-
ted roads ....................................... 173
New brake pads/linings ................ 173
Off-road driving .............................. 176
Off-road fording ............................. 174
Running-in tip s............................... 145 8
Index

K
Key Changing the battery ...................... .81
Checking the battery ...................... .81
Convenience closing feature ............ 94
Convenience opening feature .......... 93
Display message ............................ 285
Door central locking/unlocking ...... .79
Emergency key element ................... 80
Important safety note s.................... 78
KEYLESS-GO start function .............. 80
Loss ................................................. 83
Modifying the programming ............. 80
Overview .......................................... 78
Positions (ignition lock) ................. 146
Problem (malfunction) ..................... 83
Starting the engine ........................ 148
Key positions
Key ................................................ 146
Start/Stop button .......................... 146
KEYLESS-GO
Convenience closing ........................ 94
Deactivation ..................................... 79
Display message ............................ 285
Locking ............................................ 79
Start function ................................... 80
Starting the engine ........................ 148
Unlocking ......................................... 79
Kickdown
Driving tip s.................................... 157
Manual gearshifting ....................... 160
Kneebag ............................................... 44 L
Lamps see Warning and indicator lamps
Lane Keeping Assist
Activating/deactivating ................. 245
Display message ............................ 274
Function/information .................... 220
see Active Lane Keeping Assist
Lap time (RACETIMER) ...................... 250
Lashing eyelets ................................. 303
Level control (display message) ...... 273
Licence plate lamp (display mes-
sage) ................................................... 267 Light sensor (display message)
....... 268
Lights
Activating/deactivating the Intel-
ligent Light System ........................ 246
Active light function ....................... 118
Adaptive Highbeam Assist PLUS .... 119
Automatic headlamp mode ............ 115
Cornering light function ................. 118
Dipped-beam headlamp s............... 116
Driving abroad ............................... 115
Foglamps (extended range) ........... 119
Hazard warning lamps ................... 117
Headlamp flashe r........................... 117
Light switch ................................... 115
Main-beam headlamp s................... 117
Motorway mode ............................. 118
Parking lamps ................................ 116
Rear foglamp ................................. 116
Side lamps ..................................... 116
Turn signals ................................... 117
see Interior lighting
LIM indicator lamp
Cruise control ................................ 179
DISTRONIC PLUS ........................... 184
Variable SPEEDTRONIC ................. 181
Limiting the speed
see SPEEDTRONIC
Loading guidelines ............................ 299
Locking
see Central locking
Locking (doors)
Automatic ........................................ 86
Emergency locking ........................... 87
From inside (central locking but-
ton) .................................................. 85
Locking centrally
see Central locking
Locking verification signal (on-
board computer) ............................... 247
Luggage compartment enlarge-
ment
Important safety notes .................. 302
Luggage compartment floor
Important safety notes .................. 305
opening/closing ............................ 305
stowage well, under ....................... 305
Lumbar support
Adjusting (on the seat) .................. 105 12
Index

Trailer coupling
see Towing a trailer
Trailer towing
7-pin connector ............................. 232
Blind Spot Assist ............................ 220
Cleaning the trailer tow hitch ......... 328
Coupling up a traile r...................... 229
Decoupling a trailer ....................... 230
Driving tips .................................... 227
Important safety notes .................. 226
Lights display message .................. 266
Mounting dimensions .................... 384
Parktronic ...................................... 199
Power supply ................................. 232
Problem (fault) ............................... 233
Trailer load s................................... 385
Transmission
see Automatic transmission
Transmission position display ......... 154
Transmission position display
(DIRECT SELECT lever) ...................... 154
Transporting the vehicle .................. 345
Travelling uphill
Brow of hill ..................................... 178
Driving downhill ............................. 178
Maximum gradient-climbing capa-
bility ............................................... 178
Trim pieces (cleaning instruc-
tions) .................................................. 329
Trip computer (on-board com-
puter) .................................................. 238
Trip meter
Calling up ....................................... 238
Resetting (on-board computer) ...... 239
Turn signals
Switching on/of f........................... 117
TV
Operating (on-board computer) ..... 242
see Separate operating instructions
Two-way radio
Frequencies ................................... 372
Installation ..................................... 372
Transmission output (maximum) .... 372
Type identification plate
see Vehicle identification plate
Tyre changing tool kit ....................... 332Tyre inflation compressor
see TIREFIT kit
Tyre pressure
Calling up (on-board computer) ..... 354
Display message ............................ 279
Not reached (TIREFIT) .................... 336
Reached (TIREFIT) .......................... 336
Recommended ............................... 351
Tyre pressure loss warning
General notes ................................ 353
Important safety notes .................. 353
Restarting ...................................... 353
Tyre pressure monitor
Checking the tyre pressure elec-
tronically ........................................ 354
Function/note s............................. 354
General notes ................................ 354
Important safety notes .................. 354
Radio type approval for the tyre
pressure monitor ........................... 356
Restarting ...................................... 355
Warning lamp ................................. 298
Warning message .......................... 355
Tyres
Changing a whee l.......................... 356
Checking ........................................ 349
Direction of rotation ...................... 357
Display message ............................ 279
General notes ................................ 361
Important safety notes .................. 348
Information on driving .................... 348
M+S tyres ...................................... 350
MOExtended tyre s......................... 350
Replacing ....................................... 356
Service life ..................................... 349
Storing ........................................... 357
Tyre size (data ).............................. 361
Tyre tread ...................................... 349
Wheel and tyre combinations ........ 362
see Flat tyre U
Unlocking Emergency unlocking ....................... 86
From inside the vehicle (central
unlocking button) ............................. 85 Index
19

Never modify parts of the restraint system. Do
not attempt to modify the wiring as well as
electronic components or their software.
If it is necessary to modify an airbag system to
accommodate a person with disabilities, con-
tact a Mercedes-Benz Service Centre. Restraint system warning lamp
The functions of the restraint system are
checked after the ignition is switched on and at
regular intervals while the engine is running.
Therefore, malfunctions can be detected in
good time.
The 6 restraint system warning lamp in the
instrument cluster lights up when the ignition is switched on. It goes out no later than a few sec-
onds after the vehicle is started. The compo-
nents of the restraint system are in operational
readiness.
A malfunction has occurred if the 6restraint
system warning lamp:
R does not light up after the ignition is switched
on
R does not go out after a few seconds with the
engine running
R lights up again while the engine is running G
WARNING
If the restraint system is malfunctioning,
restraint system components may be trig-
gered unintentionally or might not be trig-
gered at all in the event of an accident with a high rate of vehicle deceleration. This can
effect belt tensioners or airbags, for example. There is an increased risk of serious or even
fatal injuries.
Have the restraint system checked and
repaired immediately at a qualified specialist
workshop. PASSENGER AIR BAG indicator lamp
PASSENGER AIR BAG ON indicator lamp
:and
PASSENGER AIR BAG OFF indicator lamp ;are
part of the automatic deactivation system of the front-passenger front airbag.
The indicator lamps display the status of the
front-passenger front airbag.
R PASSENGER AIR BAG ON lights up: the front-
passenger front airbag is enabled. If, in the
event of an accident, all deployment criteria
are met, the front-passenger front airbag is
deployed.
R PASSENGER AIR BAG OFF lights up: the front-
passenger front airbag is disabled. It will then
not be deployed in the event of an accident.
Depending on the person in the front-passenger seat, the front-passenger front airbag must
either be disabled or enabled; see the following
points. You must make sure of this both before
and during a journey.
R Children in a rearward-facing child
restraint system: the PASSENGER AIR BAG
OFF indicator lamp must be lit. The front-
passenger front airbag is disabled. It is imper-
ative to observe the notes on the "Automatic front-passenger front airbag deactivation sys-
tem" (Y page 45) and on "Children in the
vehicle" (Y page 52).
R Children in a forward-facing child
restraint system: depending on the installed
child restraint system and the age and size of the child, the front-passenger front airbag is
either disabled or enabled. Therefore, it is
imperative to observe the notes on the "Auto-
matic front-passenger front airbag deactiva-
tion system" (Y page 45) and on "Children in
the vehicle" (Y page 52).
R All other persons: the PASSENGER AIR BAG
ON indicator lamp must be lit. The front-
passenger front airbag is enabled. Depending 38
Occupant safetySafety

of the front-passenger front airbag both before
and during the journey.
If a person sits in the passenger seat, they must
be:
R seated with the seat belt fastened correctly
R in an almost upright position with their back
against the seat backrest
R with their feet resting on the floor, if possible
If the front passenger does not observe these
conditions, the automatic front-passenger front
airbag deactivation system may be influenced,
e.g. because the front passenger:
R transfers their weight by supporting them-
selves on a vehicle armrest
R sits in such a way that their weight is raised
from the seat cushion
The front-passenger front airbag may be disa-
bled by mistake as a result of these or similar
actions. In this case, the PASSENGER AIR BAG
OFF indicator lamp lights up permanently. The
front-passenger front airbag does not then
deploy during an accident. G
WARNING
If the PASSENGER AIRBAG OFF indicator lamp is lit, the front-passenger front airbag is disa-
bled. It will not be deployed in the event of an
accident and cannot perform its intended pro-
tective function. A person in the front-
passenger seat could then, for example, come
into contact with the vehicle's interior, espe-
cially if the person is sitting too close to the
dashboard. This poses an increased risk of
injury or even fatal injury.
When the front-passenger seat is occupied,
always make sure that:
R the classification of the person in the front-
passenger seat is correct and that the front-
passenger front airbag is enabled or disa-
bled in accordance with the person in the
front-passenger seat.
R the front-passenger seat has been moved
back as far back as possible.
R the person is seated correctly.
Make sure, both before and during the jour-
ney, that the status of the front-passenger
front airbag is correct. G
WARNING
If you secure a child on the co-driver's seat in a rearward-facing child restraint system and
the PASSENGER AIR BAG ON indicator lamp
lights up, the co-driver's airbag could be
deployed in the event of an accident. The child could be struck by the airbag. There is an
increased risk of injury, possibly even fatal.
In this case, always ensure that the co-driver's
airbag is disabled. The PASSENGER AIRBAG
OFF indicator lamp must light up.
If the PASSENGER AIR BAG OFF indicator lamp
remains off and/or the PASSENGER AIR BAG
ON indicator lamp lights up, do not install a rear- ward-facing child restraint system on the front-
passenger seat. Further information can be
found under "Problems with the automatic front-
passenger front airbag deactivation system"
(Y page 49). G
WARNING
If you secure a child in a forward-facing child
restraint system on the front-passenger seat
and you position the front-passenger seat too close to the dashboard, in the event of an
accident, the child could:
R come into contact with the vehicle's inte-
rior if the PASSENGER AIR BAG OFF indi-
cator lamp is lit, for example
R be struck by the airbag if the PASSENGER
AIR BAG ON is lit up
This poses an increased risk of injury or even fatal injury.
Move the front-passenger seat as far back as
possible. Always make sure that the shoulder belt strap is correctly routed from the vehicle
belt outlet to the shoulder belt guide on the
child restraint system. The shoulder belt strap
must be routed forwards and downwards
from the vehicle belt outlet. If necessary,
adjust the vehicle belt outlet and the front-
passenger seat accordingly. Always observe
the information in this Owner's Manual on
suitable positioning of the child restraint sys- tem in addition to the child restraint system
manufacturer's installation instructions. 46
Occupant safetySafety

If the automatic front-passenger front airbag
deactivation system detects that:
R the front-passenger seat is unoccupied, the
PASSENGER AIR BAG OFF indicator lamp
lights up after the system self-test and
remains lit. This indicates that the front-
passenger front airbag is disabled.
R the front-passenger seat is occupied by a
child in a rearward-facing child restraint sys-
tem, the PASSENGER AIR BAG OFF indicator
lamp lights up after the system self-test and
remains lit. This indicates that the front-
passenger front airbag is disabled.
But in the case of a child in a rearward-facing
child restraint, the PASSENGER AIR BAG ON
indicator lamp can light up after the system
self-test and remain lit. This indicates that the front-passenger front airbag is enabled. The
result of the classification is dependent on,
among other factors, the child restraint sys-
tem and the child's build. It is recommended
that you fit the child restraint system to a
suitable rear seat.
R the front-passenger seat is occupied by a
child in a forward-facing child restraint sys-
tem, either the PASSENGER AIR BAG ON or
PASSENGER AIR BAG OFF indicator lamp
lights up and remains lit after the system self-
test depending on the result of the classifica- tion. The result of the classification is depend-
ent on, among other factors, the child
restraint system and the child's build.
Move the front-passenger seat as far back as possible. Always observe the information in
"Child restraint systems on the front-
passenger seat" (Y page 56) and in "Suita-
ble positioning of the child restraint system"
(Y page 57). Alternatively, you can fit the
child restraint system to a suitable rear seat.
R the front-passenger seat is occupied by a per-
son with a smaller build (e.g. a teenager or
small adult), either the PASSENGER AIR BAG
ON or PASSENGER AIR BAG OFF indicator
lamp lights up and remains lit after the system self-test depending on the result of the clas-
sification.
- if the PASSENGER AIR BAG ON indicator
lamp lights up, move the front-passenger
seat as far back as possible. Alternatively, a person with a small build can sit on a rear
seat.
- if the PASSENGER AIR BAG OFF indicator
lamp is lit, a person with a smaller build
should not use the front-passenger seat.
R the front-passenger seat is occupied by an
adult or a person with a build corresponding
to that of an adult, the PASSENGER AIR BAG
ON indicator lamp lights up after the system
self-test and remains lit. This indicates that
the front-passenger front airbag is enabled.
If children are travelling in the vehicle, be sure to
observe the notes on "Children in the vehicle"
(Y page 52).
If the automatic front-passenger front airbag
deactivation system is malfunctioning, the red
6 restraint system warning lamp in the
instrument cluster and the PASSENGER AIR
BAG OFF indicator lamp light up simultaneously.
The front-passenger front airbag is disabled in
this case and does not deploy during an acci-
dent. Have the system checked as soon as pos-
sible by qualified technicians. Consult a
Mercedes-Benz Service Centre. The front-
passenger seat should only be repaired at a
Mercedes-Benz Service Centre.
If the front-passenger seat, the seat cover or the seat cushion is damaged, have the necessary
repair work carried out at a Mercedes-Benz Ser-vice Centre.
For safety reasons, Mercedes-Benz recom-
mends that you only use a child restraint system which has been tested and approved by
Mercedes-Benz in combination with the auto-
matic front-passenger front airbag deactivation
system.
System self-test G
DANGER
If both the PASSENGER AIR BAG OFF and
PASSENGER AIR BAG ON indicator lamps do
not light up during the system self-test, the
system is malfunctioning. The front-
passenger front airbag might be triggered
unintentionally or might not be triggered at all in the event of an accident with high deceler-
ation. This poses an increased risk of injury or even fatal injury.
In this case the front-passenger seat may notbe used. Do not install a child restraint system Occupant safety
47Safety
Z

Problems with automatic front-passenger front airbag deactivation
Be sure to observe the notes on "System self-test" (Y
page 47).Problem
Possible causes/consequences and
M
MSolutions The PASSENGER AIR
BAG OFF indicator lamp
lights up and remains lit,
even though the front-
passenger seat is occu-
pied by an adult or a per-
son with a build corre-
sponding to that of an
adult. The classification of the person on the front-passenger seat is false.
X Make sure the conditions for a correct classification of the person
on the front-passenger seat are met (Y page 45).
X If the PASSENGER AIR BAG OFF indicator lamp remains lit, the front-
passenger seat may not be used.
X Have the automatic front-passenger front airbag deactivation sys-
tem checked as soon as possible at a Mercedes-Benz Service
Centre. The PASSENGER AIR
BAG OFF indicator lamp
does not light up and/or
does not stay on.
The front-passenger seatis:
R empty
R occupied with a rear-
ward-facing child
restraint system The automatic front-passenger front airbag deactivation system is
malfunctioning.
X Make sure there is nothing between the seat and the child restraint
system.
X Make sure that the entire base of the child restraint system rests on
the seat cushion of the front-passenger seat.
X When installing the child restraint system, make sure that the seat
belt is tight. Do not pull the seat belt tight with the front-passenger
seat adjustment. This could result in the seat belt and the child
restraint system being pulled too tightly.
X Check that the child restraint system is installed correctly.
X Make sure that no objects are applying additional weight to the
seat.
X If the PASSENGER AIR BAG OFF indicator lamp remains off and/or
the PASSENGER AIR BAG ON indicator lamp lights up, do not install
a rearward-facing child restraint system on the front-passenger
seat. It is recommended that you fit the child restraint system to a suitable rear seat.
X Have the automatic front-passenger front airbag deactivation sys-
tem checked as soon as possible at a Mercedes-Benz Service
Centre. Deployment of belt tensioners and air-
bags
Important safety notes G
WARNING
After the airbag deploys, the airbag parts are
hot. There is a risk of injury.
Do not touch the airbag parts. Have a
deployed airbag replaced at a qualified spe-
cialist workshop as soon as possible. G
WARNING
Pyrotechnic seat belt tensioners that have
been deployed are no longer operational and
are unable to perform their intended protec-
tive function. This poses an increased risk of
injury or even fatal injury.
Therefore, have pyrotechnic belt tensioners
which have been triggered immediately
replaced at a qualified specialist workshop.
Mercedes-Benz recommends that you have the
vehicle towed to a qualified specialist workshop
after an accident. Take this into account, par- Occupant safety
49Safety Z

ticularly if a seat belt tensioner was triggered or
an airbag was deployed.
An electric motor is used by PRE-SAFE ®
to trig-
ger the tightening of the seat belt in hazardous
situations. This procedure is reversible.
If the belt tensioners are triggered or an airbag is
deployed, you will hear a bang, and a small
amount of powder may also be released. The
6 restraint system warning lamp lights up.
Only in rare cases will the bang affect your hear-
ing. In general, the powder released is not haz-
ardous to health but may cause short-term
breathing difficulties to persons suffering from
asthma or other pulmonary conditions. Provided it is safe to do so, you should leave the vehicle
immediately or open the window in order to pre- vent breathing difficulties.
Operation During the first stage of a collision, the restraint
system control unit evaluates important physi-
cal data relating to vehicle deceleration or accel-
eration, such as:
R duration
R direction
R intensity
Based on the evaluation of this data, the
restraint system control unit triggers the seat
belt tensioners in the event of a head-on or rear
collision.
A seat belt tensioner can only be triggered if:
R the ignition is switched on
R the components of the restraint system are
operational. You can find further information
under: "Restraint system warning lamp"
(Y page 38)
R the belt tongue has engaged in the belt buckle
of the respective front seat
The seat belt tensioners in the rear compart-
ment are triggered independently of the lock
status of the seat belts.
If the restraint system control unit detects a high severity accident, in certain head-on collisions,
additional components of the restraint system
are deployed independently of each other:
R front airbags and driver's kneebag
R windowbag, if the system determines that
deployment can offer additional protection to
that provided by the seat belt On vehicles with the automatic front-passenger
front airbag deactivation system: depending on the person in the front-passenger seat, the
front-passenger front airbag is either disabled or
enabled. The front-passenger front airbag can
only be deployed in an accident if the
PASSENGER AIR BAG ON indicator lamp is lit.
Observe the information on the PASSENGER AIR BAG indicator lamps (Y page 38).
Your vehicle has two-stage front airbags. In the
first deployment stage, the front airbag is filled
with propellant gas to reduce the risk of injuries. The front airbag is fully deployed if the second
deployment stage is activated within a few mil-
liseconds.
The activation threshold for the seat belt ten-
sioners and airbags is determined based on the
evaluation of the vehicle's rate of deceleration
or acceleration at various points in the vehicle.
This process is pre-emptive in nature. The trig-
gering/deployment process should take place
in good time at the start of the collision.
The rate of vehicle deceleration or acceleration
and the direction of the force are essentially
determined by:
R the distribution of forces during the collision
R the collision angle
R the deformation characteristics of the vehicle
R the characteristics of the object with which
the vehicle has collided
Factors which can only be seen and measured
after a collision has occurred do not play a deci-
sive role in the deployment of an airbag, nor do
they provide an indication of airbag deployment.
The vehicle may be deformed significantly with-out an airbag being deployed. This is the case if
only parts which are relatively easily deformed
are affected and the rate of deceleration is not
high. Conversely, an airbag may be deployed
even though the vehicle suffers only minor
deformation. This is the case if, for example,
very rigid vehicle parts such as longitudinal body
members are hit, and sufficient deceleration
occurs as a result.
If the restraint system control unit detects a side impact or if the vehicle overturns, the applicable
components of the restraint system are activa-
ted independently of each other depending on
the apparent type of accident.
R Sidebags on the side on which an impact
occurs, independent from the seat belt ten-
sioner and seat belt usage 50
Occupant safetySafety