brake sensor MERCEDES-BENZ CLS-Class 2017 W218 Owner's Manual

BAS PLUS (Brake Assist System
PLUS) with Cross-Traffic AssistFunction/notes ................................ 65
BAS PLUS with Cross-Traffic Assist
(Brake Assist PLUS with Cross-
Traffic Assist)
Important safety notes .................... 65
Battery (SmartKey)
Checking .......................................... 79
Important safety notes .................... 78
Replacing ......................................... 79
Battery (vehicle)
Charging ........................................ 284
Display message ............................ 214
Important safety notes .................. 282
Jump starting ................................. 285
Belt
see Seat belts
Blind Spot Assist
Activating/deactivating (on-
board computer) ............................ 196
Display message ............................ 217
Notes/function .............................. 179
see Active Blind Spot Assist
Blootooth
®
Connecting a different mobile
phone ............................................ 241
Bluetooth
®
Searching for a mobile phone ........ 240
see also Digital Operator's Man-
ual .................................................. 236
Telephony ...................................... 239
Box (trunk) ......................................... 246
Brake Assist
see BAS (Brake Assist System)
Brake fluid
Display message ............................ 206
Notes ............................................. 326
Brake force distribution
see EBD (electronic brake force
distribution)
Brake lamps
Display message ............................ 212
Brakes
ABS .................................................. 64
Adaptive Brake Assist ...................... 68
BAS .................................................. 65 BAS PLUS with Cross-Traffic
Assist ............................................... 65
Brake fluid (notes) ......................... 326
Display message ............................ 204
High-performance brake system .... 146
HOLD function ............................... 157
Important safety notes .................. 145
Maintenance .................................. 145
Parking brake ................................ 142
Riding tips ...................................... 145
Warning lamp ................................. 228
Breakdown
Where will I find...? ........................ 277
see Flat tire
see Towing away
Brightness control (instrument
clus
ter lighting) ................................... 34
C
California
Important notice for retail cus-
tomers and lessees .......................... 26
Calling up a malfunction
see Display messages
Car
see Vehicle
Care
360° camera ................................. 274
Car wash ........................................ 270
Carpets .......................................... 276
Display ........................................... 274
Exhaust pipe .................................. 274
Exterior lights ................................ 273
Interior ........................................... 274
Matte finish ................................... 272
Notes ............................................. 270
Paint .............................................. 272
Plastic trim .................................... 275
Power washer ................................ 271
Rear view camera .......................... 274
Roof lining ...................................... 276
Seat belt ........................................ 276
Seat cover ..................................... 275
Selector lever ................................ 275
Sensors ......................................... 274
Steering wheel ............................... 275
Trim pieces .................................... 275
6Index

see PARKTRONIC
Parking assistance
see PARKTRONIC
Parking brake
Display message ............................2 05
Notes/function .............................. 142
Warning lamp ................................. 228
Parking lamps
Switching on/off ........................... 106
PARKTRONIC
Deactivating/activating ................. 165
Driving system ............................... 163
Function/notes .............................1 63
Important safety notes .................. 163
Problem (malfunction) ................... 165
Range of the sensors ..................... 163
Warning display ............................. 164
PASSENGER AIR BAG
Display message ............................ 210
PASSENGER AIR BAG OFF
Indicator lamp .................................. 42
Problems (malfunctions) ................ 210
Pets in the vehicle ............................... 63
Phone book
see also Digital Operator's Man-
ual .................................................. 236
Plastic trim (cleaning instruc-
tions) .................................................. 275
Power washers .................................. 271
Power windows
see Side windows
PRE-SAFE
®(anticipatory occupant
protection)
Display message ............................ 206
Operation ......................................... 56
PRE-SAFE
®Brake
Activating/deactivating ................. 196
Display message ............................ 207
Function/notes ................................ 72
Important safety notes .................... 73
Warning lamp ................................. 234
PRE-SAFE
®PLUS (anticipatory
occupant protection PLUS)
Display message ............................ 207
Operation ......................................... 57
Program selector button .................. 133Protection against theft
ATA (Anti-Theft Alarm system) ......... 75
Immobilizer ...................................... 74
Protection of the environment
General notes .................................. 25
Pulling away
General notes ................................ 125
Pulling away (automatic transmis-
sion) .................................................... 125
Q
QR code
Mercedes-Benz Guide App ................. 1
Rescue card ..................................... 30
Qualified specialist workshop ........... 29
R
RACE START (Mercedes-AMG vehi-
cles).................................................... 158
RACETIMER (on-board computer) .... 201
Radiator cover ................................... 266
Radio
Selecting a station ......................... 193
see separate operating instructions
Radio mode
see also Digital Operator's Man-
ual .................................................. 236
Radio-wave reception/transmis-
sion in the vehicle
Declaration of conformity ................ 28
Reading lamp ..................................... 108
Rear compartment
Setting the air vents ...................... 121
Setting the airflow ......................... 118
Setting the temperature ................ 117
Rear fog lamp
Display message ............................ 212
Rear seat (folding the backrest for-
wards/back) ...................................... 245
Rear seats
Display message ............................ 225
Rear view camera
Cleaning instructions ..................... 274
Display in the multimedia system .. 170
Function/notes ............................. 169
Switching on/off ........................... 170
16Index

Seat heating .................................... 97
Seat heating problem ...................... 98
Storing settings (memory func-
tion) ............................................... 104
Switching seat heating on/off ......... 97
Switching seat ventilation on/
off .................................................... 98
Section
Trunk ............................................... 83
Securing a load
see Securing cargo
Securing cargo .................................. 246
Selector lever
Cleaning ......................................... 275
Sensors (cleaning instructions) ....... 274
Service menu (on-board com-
puter) .................................................. 197
Service message
see ASSYST PLUS
Service products
Brake fluid ..................................... 326
Coolant (engine) ............................ 326
Engine oil ....................................... 325
Fuel ................................................ 324
Important safety notes .................. 323
Refrigerant (air-conditioning sys-
tem) ............................................... 327
Washer fluid ................................... 327
Setting the air distribution ............... 118
Setting the airflow ............................ 118
Setting the date/time format
see also Digital Operator's Man-
ual .................................................. 236
Setting the language
see also Digital Operator's Man-
ual .................................................. 236
Setting the time
see also Digital Operator's Man-
ual .................................................. 236
Settings
Factory (on-board computer) ......... 200
On-board computer ....................... 197
SETUP (on-board computer) ............. 201
Side impact air bag ............................. 47
Side marker lamp (display mes-
sage) ................................................... 212 Side windows
Cleaning ......................................... 273
Convenience closing feature ............ 88
Convenience opening feature .......... 88
Important safety information ........... 87
Opening/closing .............................. 87
Problem (malfunction) ..................... 89
Resetting ......................................... 89
Reversing feature ............................. 87
SIRIUS services
see also Digital Operator's Man-
ual .................................................. 236
Sliding sunroof
Important safety notes .................... 90
Openi
ng/closing .............................. 91
Problem (malfunction) ..................... 91
Resetting ......................................... 91
SmartKey
Changing the battery ....................... 79
Changing the programming ............. 77
Checking the battery ....................... 79
Convenience closing feature ............ 88
Convenience opening feature .......... 88
Display message ............................ 225
Door central locking/unlocking ....... 76
Important safety notes .................... 76
Loss ................................................. 80
Mechanical key ................................ 78
Overview .......................................... 76
Positions (ignition lock) ................. 123
Problem (malfunction) ..................... 80
Starting the engine ........................ 125
SMS
see also Digital Operator's Man-
ual .................................................. 236
Snow chains ...................................... 294
Sockets
Center console .............................. 253
General notes ................................ 253
Rear compartment ......................... 254
Sound
Switching on/off ........................... 237
Spare wheel
Stowing .......................................... 319
Special seat belt retractor .................. 58
Specialist workshop ............................ 29
Speed, controlling
see Cruise control
18Index

Protection of the environment
General notes
HEnvironmental note
Daimler's declared policy is one of compre-
hensive environmental protection.
The objectives are for the natural resources
that form the basis of our existence on this
planet to be used sparingly and in a manner
that takes the requirements of both nature
and humanity into account.
You too can help to protect the environment
by operating your vehicle in an environmen-
tally responsible manner.
Fuel consumption and the rate of engine,
transmission, brake and tire wear are affected by these factors:
Roperating conditions of your vehicle
Ryour personal driving style
You can influence both factors. You should
bear the following in mind:
Operating conditions:
Ravoid short trips as these increase fuel con-
sumption.
Ralways make sure that the tire pressures
are correct.
Rdo not carry any unnecessary weight.
Rremove roof racks once you no longer need
them.
Ra regularly serviced vehicle will contribute
to environmental protection. You should
therefore adhere to the service intervals.
Ralways have service work carried out at a
qualified specialist workshop.
Personal driving style:
Rdo not depress the accelerator pedal when
starting the engine.
Rdo not warm up the engine when the vehicle
is stationary.
Rdrive carefully and maintain a safe distance
from the vehicle in front.
Ravoid frequent, sudden acceleration and
braking.
Rchange gear in good time and use each gear
only up to Ôof its maximum engine speed.
Rswitch off the engine in stationary traffic.
Rkeep an eye on the vehicle's fuel consump-
tion.
Environmental concerns and recom-
mendations
Wherever the operating instructions require you
to dispose of materials, first try to regenerate or
re-use them. Observe the relevant environmen-
tal rules and regulations when disposing of
materials. In this way you will help to protect the
environment.
Genuine Mercedes-Benz parts
HEnvironmental note
Daimler AG also supplies reconditioned major
assemblies and parts which are of the same
quality as new parts. They are covered by the
same Limited Warranty entitlements as new
parts.
!Air bags and Emergency Tensioning Devi-
ces, as well as control units and sensors for
these restraint systems, may be installed in
the following areas of your vehicle:
Rdoors
Rdoor pillars
Rdoor sills
Rseats
Rcockpit
Rinstrument cluster
Rcenter console
Do not install accessories such as audio sys-
tems in these areas. Do not carry out repairs or welding. You could impair the operating
efficiency of the restraint systems.
Have aftermarket accessories installed at a
qualified specialist workshop.
You could jeopardize the operating safety of
your vehicle if you use parts, tires and wheels as
well as accessories relevant to safety which
have not been approved by Mercedes-Benz. This
could lead to malfunctions in safety-relevant
Genuine Mercedes-Benz parts25
Introduction
Z

Function
PRE-SAFE®intervenes:
Rin emergenc ybraking situations, e.g. when
BA Sis activated
Rin critical driving situations, e.g. when physi-
cal limits are exceeded and th evehicl eunder-
steer sor oversteer sseverely
Ron vehicles wit hth eDrivin gAssistanc epack-
age: if BA SPLU Sintervenes powerfully or th e
radar sensor system detect san imminent
danger of collision in certai nsituation s
PRE-SAF E
®takes thefollowin gmeasures
depending on th ehazardous situation detected:
Rth efron tseat belt sare pre-tensioned.
Rth efront-passenger seat is adjusted if it is in
an unfavorable position .
Rif thevehicl eskids, th eside windows and th e
sliding sunroo fare closed.
Rvehicles wit h amulticontour seat or active
multicontour seat :th eair pressur ein th eside
bolsters of th ebackrest is increased.
If th ehazardous situation passes without result -
ing in an accident, PRE-SAF E
®slackens thebelt
pre-tensioning .On vehicles wit hmulticontour
seat sor active multicontour seats, th eair pres-
sure in th eside bolsters is reduce dagain .All
setting smade by PRE-SAF E
®can then be
reversed.
If th eseat belt pre-tensioning is no treduced:
XMov eth eseat backrest or seat bac kslightly
when th evehicl eis stationary.
The seat belt pre-tensioning is reduce dand
th elockin gmechanism is released.
The seat-belt adjustmen tis an integral part of
th ePRE-SAF E
®convenience function .Informa-
tion about th econvenience function can be
foun dunder "Belt adjustment" (
Ypage 45).
PRE-SAFE®PLUS (anticipatory occu-
pant protection system PLUS)
Introduction
PRE-SAF E®PLUSis only available in vehicles
wit hth eDrivin gAssistanc epackage.
Usin gth eradar sensor system, PRE-SAF E
®
PLUSis able to detect that ahead-on or rear-end
collision is imminent .In certai nhazardous sit -uations, PRE-SAF
E
®PLUStakes pre-emptive
measures to protect th evehicl eoccupants.
Important safety notes
The intervention of PRE-SAF E®PLUScanno t
preven tan imminent collision .
The driver is no twarned about th eintervention
of PRE-SAF E
®PLUS.
PRE-SAF E®PLUSdoes no tinterven eif th evehi-
cle is backin gup.
When driving ,or when parking or exiting apark -
ing spac ewit hassistanc efrom Active Parking
Assist ,PRE-SAF E
®PLUSwill no tapply th e
brakes.
Function
PRE-SAF E®PLUSintervenes in certai nsitua-
tion sif th eradar sensor system detect san
imminent head-on or rear-end collision .
PRE-SAF E
®PLUStakes th efollowin gmeasures
depending on th ehazardous situation detected:
Rif th eradar sensor system detect sthat a
head-on collision is imminent ,th eseat belt s
are pre-tensioned.
Rif th eradar sensor system detect sthat arear -
en dcollision is imminent :
-thebrak epressur eis increased if th edriver
applie sth ebrakes when th evehicl eis sta-
tionary.
-th eseat belt sare pre-tensioned.
The PRE-SAF E®PLUSbraking application is can -
celed:
Rif th eaccelerato rpedal is depressed when a
gear is engage d
Rif theris kof acollision passes or is no longer
detected
Rif DISTRONI CPLU Sindicates an intention to
pull away
If th ehazardous situation passes without result -
ing in an accident, th eoriginal setting sare
restored .
Occupant safety57
Safety
Z

BAS (Brake Assist System)
General information
BAS operates in emergency braking situations.
If you depress the brake pedal quickly, BAS
automatically boosts the braking force, thus
shortening the stopping distance.
Important safety notes
iObserve the "Important safety notes" sec-
tion (Ypage 64).
GWARNING
If BAS is malfunctioning, the braking distance
in an emergency braking situation is
increased. There is a risk of an accident.
In an emergency braking situation, depress
the brake pedal with full force. ABS prevents
the wheels from locking.
Braking
XKeep the brake pedal firmly depressed until
the emergency braking situation is over.
ABS prevents the wheels from locking.
The brakes will function as usual once you
release the brake pedal. BAS is deactivated.
BAS PLUS (Brake Assist PLUS) with
Cross-Traffic Assist
General information
BAS PLUS can help you to minimize the risk of a
collision with a vehicle or a pedestrian and
reduce the effects of such a collision. If BAS
PLUS detects a danger of collision, you are
assisted when braking.
iPay attention to the important safety notes
in the "Driving safety systems" section
(
Ypage 64).
BAS PLUS is only available on vehicles with the
Driving Assistance package.
For BAS PLUS to assist you when driving, the
radar sensor system and the camera system
must be operational. With the help of a sensor system and a camera
system, BAS PLUS can detect obstacles:
Rthat are in the path of your vehicle for an
extended period of time
Rthat cross the path of your vehicle
In addition, pedestrians in the path of your vehi-
cle can be detected.
BAS PLUS detects pedestrians by using typical
characteristics such as the body contours and
posture of a person standing upright.
If the radar sensor system or the camera system
is malfunctioning, BAS PLUS functions are
restricted or no longer available. The brake sys-
tem is still available with complete brake boost-
ing effect and BAS.
iObserve the restrictions described in the
"Important safety notes" section
(
Ypage 65).
Important safety notes
GWARNING
BAS PLUS cannot always clearly identify
objects and complex traffic situations.
In such cases, BAS PLUS may:
Rintervene unnecessarily
Rnot intervene
There is a risk of an accident.
Always pay careful attention to the traffic sit- uation and be ready to brake. Terminate the
intervention in a non-critical driving situation.
GWARNING
BAS PLUS cannot always clearly identify peo- ple, this is especially the case if they are mov-
ing. BAS PLUS cannot intervene in these
cases. There is a risk of an accident.
Always pay careful attention to the traffic sit-
uation and be ready to brake.
GWARNING
BAS PLUS does not react:
Rto small people, e.g. children
Rto animals
Rto oncoming vehicles
Rwhen cornering
Driving safety systems65
Safety
Z

As a result, BAS PLUS may not intervene in allcritical situations. There is a risk of an acci-
dent.
Always pay careful attention to the traffic sit-
uation and be ready to brake.
In the event of snowfall or heavy rain, the rec-
ognition can be impaired.
Recognition by the radar sensor system is also
impaired if:
Rthere is dirt on the sensors or anything else
covering the sensors
Rthere is interference by other radar sources
Rthere are strong radar reflections, for exam-
ple in parking garages
Ra narrow vehicle is traveling in front, e.g. a
motorbike
Ra vehicle is traveling in front on a different line
Rvehicles quickly move into the radar sensor
system detection range
Recognition by the camera system is also
impaired in the event of:
Rdirt on the camera or if the camera is covered
Rglare on the camera system, e.g. from the sun being low in the sky
Rdarkness
Ror if:
-pedestrians move quickly, e.g. into the path
of the vehicle
-the camera system no longer recognizes a
pedestrian as a person due to special cloth-ing or other objects
-a pedestrian is concealed by other objects
-the typical outline of a person is not distin-
guishable from the background
Following damage to the fro
nt end of the vehicle,
have the configuration and operation of the
radar sensors checked at a qualified specialist
workshop. This also applies to collisions at slow
speeds where there is no visible damage to the
front of the vehicle.
Following damage to the windshield, have the
configuration and operation of the camera sys-
tem checked at a qualified specialist workshop.
Function
To avoid a collision, BAS PLUS calculates the
brake force necessary if:
Ryou approach an obstacle, and
RBAS PLUS has detected a risk of collision
At speeds of under20 mph(30 km/h) : if you
depress the brake pedal, BAS PLUS is activated.
The increase in brake pressure will be carried
out at the last possible moment.
At speeds of above20 mph(30 km/h) : if you
depress the brake pedal sharply, BAS PLUS
automatically increases the brake pressure to a
degree suited to the traffic situation.
BAS PLUS provides braking assistance in haz-
ardous situations with vehicles in front within a
speed range between 4 mph (7 km/h) and
155 mph (250 km/h).
Up to a speed of approximately 44 mph
(70 km/h), BAS PLUS may react to:
Rstationary objects in the path of your vehicle,
e.g. stopped or parked vehicles
Rpedestrians in the path of your vehicle
Robstacles crossing your path, which move in
the detection range of the sensors and are
recognized by them
iIf BAS PLUS demands particularly high brak-
ing force, preventative passenger protection
measures (PRE-SAFE
®) are activated simulta-
neously.
XKeep the brake pedal depressed until the
emergency braking situation is over.
ABS p
revents the wheels from locking.
BAS PLUS is deactivated and the brakes func-
tion as usual, if:
Ryou release the brake pedal.
Rthere is no longer a risk of collision.
Rno obstacle is detected in front of your vehi-
cle.
Ryou depress the accelerator pedal.
Ryou activate kickdown.
66Driving safety systems
Safety

COLLISION PREVENTION ASSIST
PLUS
General information
iObserve the "Important safety notes" sec-
tion (Ypage 64).
COLLISION PREVENTION ASSIST PLUS consists
of a distance warning function with an autono-
mous braking function and adaptive Brake
Assist.
COLLISION PREVENTION ASSIST PLUS can help
you to minimize the risk of a front-end collision
with a vehicle ahead or reduce the effects of
such a collision.
If COLLISION PREVENTION ASSIST PLUS
detects that there is a risk of a collision, you will
be warned visually and acoustically. If you do not
react to the visual and audible collision warning,
autonomous braking can be initiated in critical
situations. If you apply the brake yourself in a
critical situation, the COLLISION PREVENTION
ASSIST PLUS adaptive Brake Assist assists you.
Important safety notes
In particular, the detection of obstacles can be
impaired if:
Rthere is dirt on the sensors or anything else
covering the sensors
Rthere is snow or heavy rain
Rthere is interference by other radar sources
Rthere are strong radar reflections, for exam-
ple in parking garages
Ra narrow vehicle is traveling in front, e.g. a
motorbike
Ra vehicle is traveling in front on a different line
Rnew vehicles or after a service on the COLLI-
SION PREVENTION ASSIST PLUS system
Observe the notes in the section on breaking-
in (
Ypage 122).
Following damage to the front end of the vehicle,
have the configuration and operation of the
radar sensor checked at a qualified specialist
workshop. This also applies to collisions at slow
speeds where there is no visible damage to the
front of the vehicle.
Activating/deactivating
The COLLISION PREVENTION ASSIST PLUS is
automatically active after switching on the igni-
tion.
You can activate or deactivate COLLISION PRE-
VENTION ASSIST PLUS in the on-board com-
puter (
Ypage 196). When deactivated, the dis-
tance warning function and the autonomous
braking function are also deactivated.
If COLLISION PREVENTION ASSIST PLUS is
deactivated, the æsymbol appears in the
assistance graphics display.
Distance warning function
General information
The distance warning function can help you to
minimize the risk of a front-end collision with a
vehicle ahead or reduce the effects of such a
collision. If the distance warning function
detects that there is a risk of a collision, you will
be warned visually and acoustically.
Important safety notes
iObserve the "Important safety notes" sec-
tion for driving safety systems (Ypage 64).
GWARNING
The distance warning function does not react:
Rto people or animals
Rto oncoming vehicles
Rto crossing traffic
Rwhen cornering
Thus, the distance warning function cannot
provide a warning in all critical situations.
There is a risk of an accident.
Always pay careful attention to the traffic sit-
uation and be ready to brake.
GWARNING
The distance warning function cannot always
clearly identify objects and complex traffic
situations.
In such cases, the distance warning function
may:
Rgive an unnecessary warning
Rnot give a warning
Driving safety systems67
Safety
Z

There is a risk of an accident.
Always pay careful attention to the traffic sit-uation and do not rely solely on the distance
warning function.
Function
At and above a speed of approximately 4 mph
(7 km/h), the distance warning function warns
you if you rapidly approach a vehicle in front. Anintermittent warning tone will then sound, and
the · distance warning lamp will light up in
the instrument cluster.
XBrake immediately in order to increase the
distance from the vehicle in front.
or
XTake evasive action, provided it is safe to do
so.
Due to the nature of the system, particularly
complicated but non-critical driving conditions
may also cause the system to display a warning.
With the help of the radar sensor system, the
distance warning function can detect obstacles
that are in the path of your vehicle for an exten-
ded period of time.
Up to a speed of approximately 44 mph
(70 km/h), the distance warning function can
also react to stationary obstacles, such as stop-
ped or parked vehicles.
Autonomous braking function
If the driver does not react to the distance warn-
ing signal in a critical situation, COLLISION PRE-
VENTION ASSIST PLUS can assist with the
autonomous braking function.
The autonomous braking function is available in
the following speed ranges:
Rfrom 4 mph (7 km/h) to approx. 65 mph
(105 km/h) for moving objects
Rfrom 4 mph (7 km/h) to approx. 31 mph
(50 km/h) for stationary objects
Due to the nature of the system, particularly
complicated but non-critical driving conditions
may also cause the Autonomous Braking Func-
tion to intervene.
If the autonomous braking function requires a
particularly high braking force, preventative
passenger protection measures (PRE-SAFE
®)
are activated simultaneously.
Adaptive Brake Assist
General information
iObserve the "Important safety notes" sec-
tion (Ypage 64).
With the help of adaptive Brake Assist, the dis-
tance warning signal can detect obstacles that
are in the path of your vehicle for an extended
period of time.
If adaptive Brake Assist detects a risk of colli-
sion with the vehicle in front, it calculates the
braking force necessary to avoid a collision. If
you apply the brakes forcefully, adaptive Brake
Assist will automatically increase the braking
force to a level suitable for the traffic conditions.
Adaptive Brake Assist provides braking assis-
tance in hazardous situations at speeds above
4 mph (7 km/h). It uses radar sensor technology
to assess the traffic situation.
Up to a speed of approximately 155 mph
(250 km/h), Adaptive Brake Assist is capable of reacting to moving objects that have already
been detected as such at least once over the
period of observation.
Up to a speed of approximately 44 mph
(70 km/h), adaptive Brake Assist reacts to sta-
tionary obstacles.
If adaptive Brake Assist demands particularly
high braking force, preventative passenger pro-
tection measures (PRE-SAFE
®) are activated
simultaneously (Ypage 56).
XKeep the brake pedal depressed until the
emergency braking situation is over.
ABS prevents the wheels from locking.
The brakes will work normally again if:
Ryou release the brake pedal.
Rthere is no longer any danger of a collision.
Rno obstacle is detected in front of your vehi-
cle.
Adaptive Brake Assist is then deactivated.
Important safety notes
iObserve the "Important safety notes" sec-
tion for driving safety systems (Ypage 64).
GWARNING
Adaptive Brake Assist cannot always clearly
identify objects and complex traffic situa-
tions.
68Driving safety systems
Safety

In such cases, Adaptive Brake Assist can:
Rintervene unnecessarily
Rnot intervene
There is a risk of an accident.
Always pay careful attention to the traffic sit- uation and be ready to brake. Terminate the
intervention in a non-critical driving situation.
GWARNING
Adaptive Brake Assist does not react:
Rto people or animals
Rto oncoming vehicles
Rto crossing traffic
Rwhen cornering
As a result, the Adaptive Brake Assist may not
intervene in all critical conditions. There is a
risk of an accident.
Always pay careful attention to the traffic sit- uation and be ready to brake.
Due to the nature of the system, particularly
complicated but non-critical driving conditions
may also cause Brake Assist to intervene.
If adaptive Brake Assist is not available due to a
malfunction in the radar sensor system, the
brake system remains available with full brake
boosting effect and BAS.
ESP®(Electronic Stability Program)
General notes
iObserve the "Important safety notes" sec-
tion (Ypage 64).
ESP
®monitors driving stability and traction, i.e.
power transmission between the tires and the
road surface.
If ESP
®detects that the vehicle is deviating from
the direction desired by the driver, one or more
wheels are braked to stabilize the vehicle. The
engine output is also modified to keep the vehi-
cle on the desired course within physical limits.
ESP
®assists the driver when pulling away on
wet or slippery roads. ESP®can also stabilize
the vehicle during braking.
ETS/4ETS (Electronic Traction System)
ETS traction control is part of ESP®. On vehicles
with 4MATIC, 4ETS is part of ESP®.
Traction control brakes the drive wheels indi-
vidually if they spin. This enables you to pull
away and accelerate on slippery surfaces, for
example if the road surface is slippery on one
side. In addition, more drive torque is transfer-
red to the wheel or wheels with traction.
Traction control remains active, even if you
deactivate ESP
®.
Important safety notes
iObserve the "Important safety notes" sec-
tion (Ypage 64).
GWARNING
If ESP
®is malfunctioning, ESP®is unable to
stabilize the vehicle. Additionally, further driv-
ing safety systems are deactivated. This
increases the risk of skidding and an accident.
Drive on carefully. Have ESP
®checked at a
qualified specialist workshop.
!Vehicles with 4MATIC: function or perform-
ance tests may only be carried out on a 2-axle dynamometer. Before you operate the vehicle
on such a dynamometer, please consult a
qualified workshop. You could otherwise
damage the drive train or the brake system.
Vehicles without 4MATIC: observe the notes on
ESP
®(Ypage 289) when towing the vehicle
with a raised rear axle.
If the å ESP
®OFF warning lamp lights up
continuously, then ESP®is deactivated.
If the ÷ ESP®warning lamp and the å
ESP®OFF warning lamp are lit continuously,
ESP®is not available due to a malfunction.
Observe the information on warning lamps
(
Ypage 229) and display messages which may
be shown in the instrument cluster
(
Ypage 204).
iOnly use wheels with the recommended tire
sizes. Only then will ESP®function properly.
Driving safety systems69
Safety
Z