check engine MERCEDES-BENZ S CLASS 2016 Owners Manual

Anti-Theft Alarm system
see ATA (Anti-Theft Alarm system)
Arm rest
St owage compartment .................. 327
Asht ra y .............................................. .3 34
Assistance display (on-board com-
puter) ................................................. .2 68
Assistance menu (on-board com-
puter) ................................................. .2 69
ASSYST PLUS
Displaying a service message ....... .3 58
Hiding a service message .............. 358
Resetting the service interval dis-
play ................................................ 358
Service message ............................ 357
Special service requirements ......... 358
ATA (Anti-Theft Alarm system)
Activating/deactivating ................... 78
Function .......................................... .7 8
Switching off the alarm .................... 78
ATTENTION ASSIST
Activating/deactivating ................. 271
Display message ............................ 299
Function/notes ............................. 228
Authorized Mercedes-Benz Center
see Qualified specialist workshop
Authorized workshop
see Qualified specialist workshop
AUTO lights
Display message ............................ 293
see Lights
Automatic car wash (care) ............... 359
Automatic engine start (ECO start/
stop function) .................................... 167
Automatic engine switch-off (ECO
start/stop function) .......................... 166
Automatic headlamp mode .............. 130
Automatic transmission
Accelerator pedal position ............. 173
Automatic drive program ............... 174
Changing gear ............................... 173
DIRECT SELECT lever ..................... 170
Display message ............................ 308
Driving tips .................................... 173
Emergency running mode .............. 177
Engaging drive pos itio n .................. 171
Eng aging neutral ............................ 171 Engaging park position automati-
cally ............................................... 170
Engaging reverse gear ................... 171
Engaging the park position ............ 170
Kickdown ....................................... 173
Manual drive program .................... 174
Manual drive program (Mercedes-
AMG vehicles) ................................ 175
Oil temperature (on-board com-
puter, Mercedes-AMG vehicles) ..... 275
Overview ........................................ 170
Problem (malfunction) ................... 177
Program selector button ................ 173
Pulling away ................................... 165
Starting the engine ........................ 164
Steering wheel paddle shifters ...... 174
Transmission position display ........ 172
Transmission positions .................. 172
Automatic transmission emer-
gency mode ....................................... 177
B BAS (Brake Assist System) ................. 69
BAS PLUS (Brake Assist System
PLUS) with Cross-Traffic Assist
Function/notes ................................ 69
BAS PLUS with Cross-Traffic Assist
(Brake Assist PLUS with Cross-
Traffic Assist)
Important safety notes .................... 69
Battery (high-voltage)
see High-voltage battery
Battery (SmartKey)
Checking .......................................... 82
Important safety notes .................... 82
Replacing ......................................... 82
Battery (vehicle)
Charging ........................................ 374
Display message ............................ 295
Important safety notes .................. 372
Jump starting ................................. 376
Belt
see Seat belts
Belt bag ................................................ 48
Blind Spot Assist
see Active Blind Spot Assist4
Index

Removin g ...................................... .1 85
Storing .......................................... .1 83
Warming up ................................... 182
Charging the high-voltage battery
(important safety notes) ................... 180
Chauffeur mode
Display message ............................ 310
Fully reclined position .................... 114
General notes ................................ 111
Installing the head restraint ........... 113
Moving front-passenger seat into
the chauffeur position .................... 112
Moving the front-passenger seat
into the normal position ................. 113
Removing the head restraint .......... 113
Child
Restraint system .............................. 62
Child seat
Forward-facing restraint system ...... 66
LATCH-type (ISOFIX) child seat
anchors ............................................ 63
On the front-passenger seat ............ 65
Rearward-facing restraint system .... 66
Top Tether ....................................... 64
Child-proof locks
Important safety notes .................... 66
Rear doors ....................................... 67
Children
Special seat belt retractor ............... 62
Cigarette lighter ................................ 335
Cleaning
Mirror turn signal ........................... 362
Climate control
Automatic climate control ............. 141
Controlling automatically ............... 147
Cooling with air dehumidification .. 146
Defrosting the windows ................. 151
Defrosting the windshield .............. 151
ECO start/stop function ................ 145
General notes ................................ 140
Immediate pre-entry climate con-
trol ................................................. 158
Indicator lamp ................................ 147
Ionization ....................................... 155
Notes on using the automatic cli-
mate control .................................. 145
Overview of systems ...................... 140
Perfume atomizer .......................... 153 Pre-entry climate control at
departure time ............................... 157
Pre-entry climate control via key ... 155
P ro blem with the rear window
defroster ........................................ 152
Problems with cooling with air
dehumidification ............................ 147
Rear control panel ......................... 141
Refrigerant ..................................... 432
Refrigerant filling capacity ............. 432
Setting the air distribution ............. 149
Setting the air vents ...................... 158
Setting the airflow ......................... 150
Setting the climate mode ............... 148
Setting the temperature ................ 148
Switching air-recirculation mode
on/off ............................................ 152
Switching on/off ........................... 145
Switching residual heat on/off ...... 152
Switching the rear window
defroster on/off ............................ 151
Switching the synchronization
function on and off ........................ 150
Climate control system
Climate control .............................. 145
Cockpit
Overview .......................................... 32
COLLISION PREVENTION ASSIST
PLUS
Activating/deactivating ................. 270
Display message ............................ 284
Operation/notes .............................. 71
COMAND display
Cleaning ......................................... 364
Combination switch .......................... 131
Consumption statistics (on-board
computer) .......................................... 262
Convenience closing feature .............. 96
Convenience opening feature ............ 95
Coolant (engine)
Checking the level ......................... 356
Display message ............................ 294
Displaying the temperature (on-
board computer) ............................ 269
Filling capacity ............................... 431
Important safety notes .................. 431
Temperature gauge ........................ 257
Warning lamp ................................. 3206
Index

ECO display
Function/notes ............................ .1 93
On-board computer ....................... 262
ECO start/stop function
Automatic engine start .................. 167
Automatic engine switch-off .......... 166
Deactivating/activating ................. 167
General information ....................... 166
Important safety notes .................. 166
Introduction ................................... 166
Electronic Stability Program
see ESP ®
(Electronic Stability Program)
Emergency
Automatic measures after an acci-
dent ................................................. 61
Emergency release
Driver's door ................................... .8 7
Trunk ............................................... 94
Vehicle ............................................. 87
Emergency Tensioning Devices
Activation ......................................... 57
Emissions control
Service and warranty information ... .2 5
Engine
Check Engine warning lamp .......... .3 20
Display message ............................ 294
ECO start/stop function ................ 166
Engine number ............................... 427
Irregular running ............................ 169
Jump-starting ................................. 376
Starting (important safety notes) ... 164
Starting problems .......................... 169
Starting the engine with the
SmartKey ....................................... 164
Starting via smartphone ................ 164
Starting with the Start/Stop but-
ton ................................................. 164
Switching off .................................. 190
Switching off with the Start/Stop
button ............................................ 190
Switching off with the vehicle key .. 190
Tow-starting (vehicle) ..................... 381
Engine electronics
Problem (malfunction) ................... 169
Engine oil
Adding .......................................... .3 55
Additives ........................................ 430
Checking the oil leve l ..................... 353 C he
cking the oil level using the
dipstick .......................................... 353
Checking the oil level using the
on-board computer ........................ 355
Display message ............................ 296
Filling capacity ............................... 430
General notes ................................ 429
Notes about oil grades ................... 429
Notes on oil level/consumption .... 353
Temperature (on-board computer,
Mercedes-AMG vehicles) .............. .2 75
Viscosity ........................................ 430
ESP ®
(Electronic Stability Pro-
gram)
AMG menu (on-board computer) ... 276
Characteristics ................................. 73
Deactivating/activating ................. 269
Deactivating/activating (notes) ....... 74
Display message ............................ 278
Function/notes ................................ 73
General notes .................................. 73
Important safety information ........... 73
Trailer stabilization ........................... 74
Warning lamp ................................. 317
ETS/4ETS (Electronic Traction Sys-
tem) ...................................................... 73
Exhaust
see Exhaust pipe
Exhaust check ................................... 193
Exhaust pipe
Cleaning ......................................... 363
Exhaustive discharging (high-volt-
age battery) ....................................... 374
Exterior lighting
Cleaning ......................................... 362
see Lights
Exterior mirrors
Adjusting ....................................... 123
Dipping (automatic) ....................... 124
Folding in/out (automatically) ....... 124
Folding in/out (electrically) ........... 124
Out of position (troubleshooting) ... 124
Setting ........................................... 124
Storing settings (memory func-
tion) ............................................... 126
Storing the parking position .......... 125
Eyeglasses compartment ................. 326Index 9

Cleaning the cover ........................ .3 65
Correct driver's seat position ....... .1 04
Display message ............................ 310
EASY-ENTRY/EXIT system ............. 122
Important safety notes .................. 105
Multicontour seat .......................... 117
Seat heating .................................. 118
Seat heating problem .................... 119
Seat ventilation .............................. 119
Seat ventilation problem ................ 120
Storing settings (memory func-
tion) ............................................... 126
Switching seat heating on/off ....... 118
Switching seat ventilation on/off .. 119
Section
Wheels and tires ............................ 384
Securing a load
see Securing cargo
Securing cargo .................................. 329
Selector lever
Cleaning ......................................... 365
see Automatic transmission
Sensors (cleaning instructions) ....... 362
Service menu (on-board com-
puter) ................................................. .2 69
Service message
see ASSYST PLUS
Service products
Brake fluid ..................................... 430
Coolant (engine) ............................ 431
Engine oil ....................................... 429
Fuel ................................................ 428
Important safety notes .................. 427
Refrigerant (air-conditioning sys-
tem) ............................................... 432
Washer fluid ................................... 431
Setting the charge current (on-
board computer) ............................... 272
Setting the departure time (on-
board computer) ............................... 272
Settings
Factory (on-board computer) ......... 275
On-board computer ....................... 269
SETUP (on-board computer) ............. 276
Side impact air bag ............................ .5 2
Side marker lamp (display mes-
sage) ................................................... 292 Side windows
Cleaning ........................... .............. 362
Convenience closing feature ............ 96
Convenience opening feature ......... .9 5
Importa nt safety information ........... 94
Opening/closing .............................. 95
Problem (malfunction) .................... .9 7
Resettin g ........................................ .9 6
Reversin g feature ............................ .9 4
Sliding sunroof
see Panorama roof with power
tilt/sliding panel
SmartKey
Changing the battery ....................... 82
Changing the programming ............ .8 1
Checking the battery ...................... .8 2
Convenience closing feature ............ 96
Convenience opening feature .......... 95
Display message ............................ 312
Door central locking/unlocking ...... .7 9
Important safety notes .................... 79
KEYLESS-GO start function .............. 81
Loss ................................................ .8 4
Mechanical key ................................ 81
Overview .......................................... 79
Positions (ignition lock) ................. 162
Problem (malfunction) ..................... 84
Starting the engine ........................ 164
Smartphone
Starting the engine ........................ 164
Snow chains ...................................... 386
Sockets
Center console .............................. 336
General notes ................................ 336
Rear compartment ........................ .3 37
Trunk ............................................. 337
Special seat belt retractor .................. 62
Specialist workshop ............................ 28
Speed, controlling
see Cruise control
Speedometer
Activating/deactivating the addi-
tional speedometer ........................ 274
Digital ............................................ 263
In the Instrument cluster ................. 33
Selecting the display unit .............. .2 74
Standing lamps
Display message ............................ 29218
Index

Coolant (on-board computer) ........ .2 69
Engine oil (on-board computer,
Mercedes-AMG vehicles) .............. .2 75
Outside temperature ..................... .2 57
Setting (climate control) ................ 148
Transmission oil (on-board com-
puter, Mercedes-AMG vehicles) ..... 275
Tire pressure
Calling up (on-board computer) ..... 390
Checking manually ........................ 390
Display message ............................ 306
Maximum ....................................... 390
Not reached (TIREFIT) .................... 370
Notes ............................................. 389
Reached (TIREFIT) .......................... 371
Recommended ............................... 387
Tire pressure loss warning system
General notes ................................ 393
Important safety notes .................. 393
Restarting ...................................... 394
Tire pressure monitor
Checking the tire pressure elec-
tronically ........................................ 392
Function/notes ............................ .3 90
General notes ................................ 390
Important safety notes .................. 391
Radio type approval for the tire
pressure monitor ........................... 393
Restarting ...................................... 392
Warning lamp ................................. 323
Warning message .......................... 392
TIREFIT kit
Important safety notes .................. 369
Storage location ............................ 367
Tire pressure not reached .............. 370
Tire pressure reached .................... 371
Using ............................................. 369
Tires
Aspect ratio (definition) ................. 404
Average weight of the vehicle
occupants (definition) .................... 403
Bar (definition) ............................... 403
Changing a wheel .......................... 405
Characteristics .............................. 403
Checking ........................................ 385
Curb weight (definition) ................. 404
Definition of terms ......................... 403
Direction of rotation ...................... 405 Displa y message ............................ 306
Di stribution of the vehicle occu-
pants (definition) ............................ 405
DOT (Department of Transporta-
tion) (definition) ............................. 403
DOT, Tire Identification Number
(TIN) ............................................... 402
GAWR (Gross Axle Weight Rating)
(definition) ..................................... 403
General notes ................................ 410
GVW (Gross Vehicle Weight) (def-
inition) ........................................... 403
GVWR (Gross Vehicle Weight Rat-
ing) (definition) .............................. 404
Important safety notes .................. 384
Increased vehicle weight due to
optional equipment (definition) ...... 403
Information on driving .................... 384
Kilopascal (kPa) (definition) ........... 404
Labeling (overview) ........................ 400
Load bearing index (definition) ...... 405
Load index ..................................... 402
Load index (definition) ................... 404
Maximum load on a tire (defini-
tion) ............................................... 404
Maximum loaded vehicle weight
(definition) ..................................... 404
Maximum permissible tire pres-
sure (definition) ............................. 404
Maximum tire load ......................... 402
Maximum tire load (definition) ....... 404
MOExtended tires .......................... 386
Optional equipment weight (defi-
nition) ............................................ 404
PSI (pounds per square inch) (def-
inition) ........................................... 404
Replacing ....................................... 405
Service life ..................................... 385
Sidewall (definition) ....................... 404
Snow chains .................................. 386
Speed rating (definition) ................ 403
Storing ........................................... 405
Structure and characteristics
(definition) ..................................... 403
Summer tires in winter .................. 386
Temperature .................................. 399
TIN (Tire Identification Number)
(definition) ..................................... 40420
Index

VVanity mirror (in the sun visor) ........ 333
Vehicle
Correct use ...................................... 29
Data acquisition ............................... 29
Display message ............................ 308
Equipment ....................................... 25
Individual settings .......................... 269
Limited Warranty ............................. 29
Loading .......................................... 394
Locking (in an emergency) ............... 88
Locking (SmartKey) .......................... 79
Lowering ........................................ 409
Maintenance .................................... 26
Operating safety .............................. 27
Parking .......................................... 189
Parking for a long period ................ 192
Pulling away ................................... 165
Raising ........................................... 406
Reporting problems ......................... 29
Securing from rolling away ............ 406
Towing away .................................. 379
Transporting .................................. 381
Unlocking (in an emergency) ........... 87
Unlocking (SmartKey) ...................... 79
Vehicle data ................................... 433
Vehicle dimensions ........................... 433
Vehicle emergency locking ................ 88
Vehicle identification number
see VIN
Vehicle identification plate .............. 426
Vehicle level
Active Body Control ABC ............... 210
AIRMATIC ...................................... 212
Display message ............................ 300
Vehicle tool kit .................................. 367
Video
Operating the DVD ......................... 267
VIN
Type plate ...................................... 426
W
Warning
Stickers ........................................... 42
Warning and indicator lamps
ABS ................................................ 316 Brakes ........................................... 315
Check Engine ................................. 320
Coolant .......................................... 320
Distance warning ........................... 322
ESP ®
.............................................. 317
ESP ®
OFF ....................................... 319
Fuel tank ........................................ 320
General notes ................................ 313
Hybrid drive system ....................... 315
Overview .......................................... 34
Parking brake ................................ 319
PASSENGER AIR BAG ...................... 46
RBS (Recuperative Brake Sys-
tem) ............................................... 315
Reserve fuel ................................... 320
Restraint system ............................ 319
Seat belt ........................................ 313
Steering ......................................... 324
Tire pressure monitor .................... 323
Warranty .............................................. 25
Washer fluid
Display message ............................ 311
Wheel and tire combinations
Tires ............................................... 412
Wheel bolt tightening torque ........... 409
Wheel chock ...................................... 406
Wheels
Changing a wheel .......................... 405
Checking ........................................ 385
Cleaning ......................................... 361
General notes ................................ 410
Important safety notes .................. 384
Information on driving .................... 384
Interchanging/changing ................ 405
Mounting a new wheel ................... 409
Mounting a wheel .......................... 406
Removing a wheel .......................... 408
Snow chains .................................. 386
Storing ........................................... 405
Tightening torque ........................... 409
Wheel size/tire size ....................... 410
Window curtain air bag
Display message ............................ 288
Operation ......................................... 53
Windows
see Side windows22
Index

One Mercedes Drive
Montvale, NJ 07645-0350
In Canada
Mercedes-Benz Canada, Inc.
European Delivery Department
98 Vanderhoof Avenue
Toronto, Ontario M4G 4C9
Operating safety
Important safety notes
G WARNING
If you do not have the prescribed service/
maintenance work or any required repairs
carried out, this can result in malfunctions or
system failures. There is a risk of an accident.
Always have the prescribed service/mainte-
nance work as well as any required repairs
carried out at a qualified specialist workshop.
G WARNING
Flammable material such as leaves, grass or
twigs may ignite if they come into contact with
hot parts of the exhaust system. There is a risk
of fire.
When driving off road or on unpaved roads,
check the vehicle's underside regularly. In
particular, remove parts of plants or other
flammable materials which have become
trapped. In the case of damage, contact a
qualified specialist workshop.
G WARNING
Modifications to electronic components, their
software as well as wiring can impair their
function and/or the function of other net-
worked components. In particular, systems
relevant to safety could also be affected. As a
result, these may no longer function as inten-
ded and/or jeopardize the operating safety of
the vehicle. There is an increased risk of an
accident and injury.
Never tamper with the wiring as well as elec-
tronic components or their software. You
should have all work to electrical and elec- tronic equipment carried out at a qualified
specialist workshop.
! There is a risk of damage to the vehicle if: R
the vehicle becomes stuck, e.g. on a high
curb or an unpaved road R
you drive too fast over an obstacle, e.g. a
curb or a hole in the road R
a heavy object strikes the undercarriage or
parts of the chassis
In situations like this, the body, the undercar-
riage, chassis parts, wheels or tires could be
damaged without the damage being visible.
Components damaged in this way can unex-
pectedly fail or, in the case of an accident, no
longer withstand the strain they are designed
to.
If the underbody paneling is damaged, com-
bustible materials such as leaves, grass or
twigs can gather between the underbody and
the underbody paneling. If these materials
come in contact with hot parts of the exhaust
system, they can catch fire.
In such situations, have the vehicle checked
and repaired immediately at a qualified spe-
cialist workshop. If on continuing your jour-
ney you notice that driving safety is impaired,
pull over and stop the vehicle immediately,
paying attention to road and traffic condi-
tions. In such cases, consult a qualified spe-
cialist workshop.
Hybrid vehicles have a combustion engine and
an electric motor. The voltage supply for oper-
ating the vehicle electrically is provided by the
vehicle's high-voltage electrical system.
G DANGER
The vehicle's high-voltage electrical system is
under high voltage. If you modify components
in the vehicle's high-voltage electrical system
or touch damaged components, you may be
electrocuted. The components in the vehi-
cle's high-voltage electrical system may be
damaged in an accident, although the damage
is not visible. There is a risk of fatal injury.
Following an accident, do not touch any high-
voltage components and never modify the
vehicle's high-voltage electrical system. Have
the vehicle towed away after an accident and Introduction 27
Z

the vehicle's high-voltage electrical system
checked by a qualified specialist workshop.
The components of the vehicle's high-voltage
electrical system are marked with yellow warn-
ing stickers. The cables of the vehicle's high-
voltage electrical system are orange in color.
Vehicles with an electric motor generate much
less driving noise than vehicles with internal
combustion engines. As a result, your vehicle
may not be heard by other road users in certain
situations. This can happen, for example, when
you are parking and your vehicle is not seen by
other road users. This requires you to adopt a
particularly anticipatory driving style, as it is
necessary to allow for the possibility that other
road users may behave erratically.
Declarations of conformity
Vehicle components which receive
and/or transmit radio waves USA: "The wireless devices of this vehicle com-
ply with Part 15 of the FCC Rules. Operation is
subject to the two following two conditions: 1)
These devices may not cause harmful interfer-
ence, and 2) These devices must accept any
interference received, including interference
that may cause undesired operation. Changes
or modifications not expressly approved by the
party responsible for compliance could void the
user’s authority to operate the equipment."
Canada: "The wireless devices of this vehicle
comply with Industry Canada license-exempt
RSS standard(s). Operation is subject to the fol-
lowing two conditions: (1) These devices may
not cause interference, and (2) These devices
must accept any interference, including inter-
ference that may cause undesired operation of
the device."
Diagnostics connection
The diagnostics connection is only intended for
the connection of diagnostic equipment at a
qualified specialist workshop.
G WARNING
If you connect equipment to the diagnostics
connection in the vehicle, it may affect the operation of the vehicle systems. As a result,
the operating safety of the vehicle could be
affected. There is a risk of an accident.
Do not connect any equipment to a diagnos-
tics connection in the vehicle.
G WARNING
Objects in the driver's footwell can restrict the
pedal travel or obstruct a depressed pedal.
The operating and road safety of the vehicle is
jeopardized. There is a risk of an accident.
Make sure that all objects in the vehicle are
stowed correctly, and that they cannot enter
the driver's footwell. Install the floormats
securely and as specified in order to ensure
sufficient clearance for the pedals. Do not use
loose floormats and do not place floormats on
top of one another.
! If the engine is switched off and equipment
on the diagnostics connection is used, the
starter battery may discharge.
Connecting equipment to the diagnostics con-
nection can lead to emissions monitoring infor-
mation being reset, for example. This may lead
to the vehicle failing to meet the requirements of
the next emissions test during the main inspec-
tion.
Qualified specialist workshop An authorized Mercedes-Benz Center is a quali-
fied specialist workshop. It has the necessary
specialist knowledge, tools and qualifications to
correctly carry out the work required on your
vehicle. This is especially the case for work rel-
evant to safety.
Observe the notes in the Maintenance Booklet.
Always have the following work carried out at an
authorized Mercedes-Benz Center: R
work relevant to safety R
service and maintenance work R
repair work R
alterations, installation work and modifica-
tions R
work on electronic components R
work on the hybrid drive system28
Introduction

Useful information
i This Operator's Manual describes all models
and all standard and optional equipment of
your vehicle available at the time of publica-
tion of the Operator's Manual. Country-spe-
cific differences are possible. Please note
that your vehicle may not be equipped with all
features described. This also applies to
safety-related systems and functions.
i Read the information on qualified specialist
workshops ( Y
page 28).
Hybrid vehicles
General notes Hybrid technology combines a fuel efficient
internal combustion engine with a powerful
electric motor.
Important safety notes
Danger of electric shock
G DANGER
The vehicle's high-voltage electrical system is
under high voltage. If you modify components
in the vehicle's high-voltage electrical system
or touch damaged components, you may be
electrocuted. The components in the vehi-
cle's high-voltage electrical system may be
damaged in an accident, although the damage
is not visible. There is a risk of fatal injury.
Following an accident, do not touch any high-
voltage components and never modify the
vehicle's high-voltage electrical system. Have
the vehicle towed away after an accident and
the vehicle's high-voltage electrical system
checked by a qualified specialist workshop.
When towing a vehicle after an accident, be sure
to observe the following sections: R
Transporting the vehicle ( Y
page 381)R
Towing a vehicle with both axles on the
ground ( Y
page 380)
Read the safety instructions on towing and tow-
starting ( Y
page 379). All components of the hybrid drive system are
marked with yellow warning stickers that warn
you of the danger of high voltage. The cables of
the vehicle's high-voltage electrical system are
orange in color.
The ignition must be switched off when carrying
out general tasks, such as adding washer fluid to
the windshield washer system or checking the
coolant level.
Automatic switching off of the hybrid
drive system If components of the restraint system are acti-
vated during an accident, the hybrid drive sys-
tem is automatically deactivated.
The hybrid drive system is not activated when
the vehicle is started if: R
an electrical short circuit is detected in the
hybrid drive system R
an electrical connection in the hybrid drive
system is disconnected
This ensures that you do not come into contact
with high voltage.
Manual switching off of the hybrid drive
system The hybrid drive system can be deactivated
manually using the high voltage switch-off
device.
! To prevent damage to the hybrid drive sys-
tem please observe the following instruc-
tions: R
only deactivate the hybrid drive system
manually in the following situations. R
work on the hybrid drive system may only
be carried out at a qualified specialist work-
shop, even when it has been deactivated
manually.42
Hybrid vehicles
Safety

Deactivate the hybrid system manually if: R
the u restraint system warning lamp in the
instrument cluster lights up after an accident R
the vehicle is badly damaged, e.g. after an
accident, and the restraint system compo-
nents were not activated R
the vehicle is badly damaged and has to be
towed or transported X
If possible, move the vehicle out of the
danger zone: shift the automatic transmis-
sion into position N .X
Release the electric parking brake. X
Roll the vehicle to a safe place and park it
safely.
Get assistance from others if necessary.
i The vehicle is locked automatically when
the ignition is switched on and the wheels are
turning. There is therefore a risk of being
locked out if the vehicle is being pushed or
tested on a dynamometer. X
Switch the ignition off. X
Shift the automatic transmission to park posi-
tion P ( Y
page 170).
Depress the electric parking brake
( Y
page 190).
Secure the vehicle against rolling away
( Y
page 406). X
To use the high-voltage switch-off device:
open the trunk lid. X
Lift the trunk floor upwards ( Y
page 329).X
Remove the right-hand paneling in the trunk.
X
Press release clip C in the direction of the
arrow and pull it out. X
Pull the high voltage switch-off device D
apart until it engages in the stop position.
If the hybrid drive system has been deactivated
due to reasons mentioned above, have it checked at a qualified specialist workshop
before reactivation.
High-voltage battery
G WARNING
In the event of a vehicle fire, the internal pres-
sure of the high-voltage battery can exceed a
critical value. In this case flammable gas
escapes through a ventilation valve on the
underbody. The gas can ignite. There is a risk
of injury.
Leave the danger zone immediately. Secure
the danger area at a suitable distance, whilst
observing legal requirements.
G WARNING
If the housing of the high-voltage battery has
been damaged, electrolyte and gases may
leak out. These are poisonous and caustic.
There is a risk of injury.
Avoid contact with skin, eyes or clothing.
Immediately rinse electrolyte splashes off
with water and seek medical attention
straight away.
! Exhaustive discharge caused by the vehicle
standing idle for lengthy periods can damage
the high-voltage battery.
Hybrid vehicles: if the vehicle is idle for
lengthy periods, run it for a few minutes once
every six weeks to charge up the high-voltage
battery. During the charging process, switch
off all electrical consumers, e.g. the auto-
matic climate control or the seat heating.
PLUG-IN HYBRID vehicles: make sure that
the high-voltage battery is connected to a
charging station during long periods when the
vehicle is standing idle.
PLUG-IN HYBRID vehicles: charging the high-
voltage battery ( Y
page 180).
Engine compartment
Before opening the hood: X
Apply the electric parking brake. X
Shift the automatic transmission to park posi-
tion P . X
Switch the ignition off.Hybrid vehicles 43
Safety Z