2009 MERCEDES-BENZ CL COUPE brake sensor
[x] Cancel search: brake sensorPage 9 of 421
Brake Assist
. . . . . . . . . . . . . . . . . . . . .49
See BAS . . . . . . . . . . . . . . . . . . . . . .49
see BAS
Brake fluid . . . . . . . . . . . . . . . . . . . . .400
Display message . . . . . . . . . . . . . .333
Brake lamps
Adaptive . . . . . . . . . . . . . . . . . . . . . .50
Display message . . . . . . . . . . . . . .346
Brakes
Warning lamp . . . . . . . . . . . . .352, 354
Brake system
Display message . . . . . . . . . . . . . .334
Brake wear
Display message . . . . . . . . . . . . . .334
Bulbs . . . . . . . . . . . . . . . . . . . . . . . . . .369
Cornering light . . . . . . . . . . . . . . . .372
Display message . . . . . . . . . . . . . .343
Infrared light . . . . . . . . . . . . . . . . .371
Main-beam spot lamp . . . . . . . . . .371
Motorway spot lamp . . . . . . . . . . .371
Replacing . . . . . . . . . . . . . . . . . . . .371
see Lamp C
Calling up a fault see Display message . . . . . . . . . . .316
Calling voicemail . . . . . . . . . . . . . . . .114
Call lists . . . . . . . . . . . . . . . . . . . . . . .123
Displaying details . . . . . . . . . . . . . .120
Saving a list entry . . . . . . . . . . . . .124
Call waiting . . . . . . . . . . . . . . . . . . . .115
Care Automatic car wash . . . . . . . . . . . .307
Care products . . . . . . . . . . . . . . . .307
Cleaning agents . . . . . . . . . . . . . . .307
Dashboard . . . . . . . . . . . . . . . . . . .310
Display . . . . . . . . . . . . . . . . . . . . . .310
Exterior . . . . . . . . . . . . . . . . . . . . .307
Headlamps . . . . . . . . . . . . . . . . . . .309
High-pressure cleaners . . . . . . . . .308
Interior . . . . . . . . . . . . . . . . . . . . . .310
Matt paintwork . . . . . . . . . . . . . . . .308
Night View Assist . . . . . . . . . . . . . .311
Paintwork . . . . . . . . . . . . . . . . . . . .308
Plastic trim . . . . . . . . . . . . . . . . . . .312
Reversing camera . . . . . . . . . . . . .310
Seat covers . . . . . . . . . . . . . . . . . .311 Sensors . . . . . . . . . . . . . . . . . . . .
.310
Steering wheel boss . . . . . . . . . . . .310
Tail pipes . . . . . . . . . . . . . . . . . . . .310
Trim strips . . . . . . . . . . . . . . . . . . .312
Windows . . . . . . . . . . . . . . . . . . . .309
Wiper blades . . . . . . . . . . . . . . . . .309
Wooden trim . . . . . . . . . . . . . . . . .312
Care products . . . . . . . . . . . . . . . . . .307
CD Inserting . . . . . . . . . . . . . . . . . . . . . .77
Menu overview . . . . . . . . . . . . . . . . .79
Playback options . . . . . . . . . . . . . . .83
Selecting a mediu m.. . . . . . . . . . . .81
Selecting a titl e.. . . . . . . . . . . . . . .81
CD player/CD changer
Operation (COMAND) . . . . . . . . . . . .77
Operation (on-board computer) . . .219
Central locking
Activating/deactivating
(COMAND) . . . . . . . . . . . . . . . . . . .167
Key . . . . . . . . . . . . . . . . . . . . . . . . .178
Central locking/unlocking button ..1 79
Central unlocking Key . . . . . . . . . . . . . . . . . . . . . . . . .178
Centre console
Overview . . . . . . . . . . . . . . . . . . . . .31
Changing a wheel
see Flat tyre
Changing direction (COMAND) . . . ..148
Changing direction (on-board com-
puter) . . . . . . . . . . . . . . . . . . . . . . . . .217
Children In the vehicle . . . . . . . . . . . . . . . . . .42
Restraint systems . . . . . . . . . . . . . .43
Child seat
Automatic recognitio n.. . . . . . . . . .44
Automatic recognition (malfunc-
tion) . . . . . . . . . . . . . . . . . . . . . . . .350
Display message . . . . . . . . . . . . . .323
ISOFIX . . . . . . . . . . . . . . . . . . . . . . .47
Recommendation s.. . . . . . . . . . . . .46
Suitable positions . . . . . . . . . . . . . .45
Cigarette lighter . . . . . . . . . . . . . . . .282
Cleaning agents . . . . . . . . . . . . . . . . .307
Cockpit Overview . . . . . . . . . . . . . . . . . . . . .256
Index 216_AKB; 2; 3, en-GB
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Fuse box
Dashboard . . . . . . . . . . . . . . . . . . .389
Engine compartment . . . . . . . . . . .390
Rea r.. . . . . . . . . . . . . . . . . . . . . . .390
Fuses . . . . . . . . . . . . . . . . . . . . . . . . . .389 G
Garage door Opening/closing (with the remote
control) . . . . . . . . . . . . . . . . . . . . .286
Garage door opener . . . . . . . . . . . . ..285
Clearing the memory . . . . . . . . . . .286
Frequencies . . . . . . . . . . . . . . . . . .408
Programming the remote control . .285
Gear indicator . . . . . . . . . . . . . . . . . .208
Gear indicator (on-board computer) 220
Genuine Mercedes-Benz parts . . . ..394
Glove compartment . . . . . . . . . . . . ..276 H
Hands-free system Switching on/off . . . . . . . . . . . . . .114
Switching to the mobile phone . . .116
Headlamp cleaning system . . . . . ..295
Headlamps Cleaning . . . . . . . . . . . . . . . . . . . . .309
Cleaning system . . . . . . . . . . . . . . .197
Misting up . . . . . . . . . . . . . . . . . . .360
Head restraints
Rear compartment . . . . . . . . . . . . .186
Heating
see Air conditioning
High-pressure cleaners . . . . . . . . . ..308
Hill start assist . . . . . . . . . . . . . . . . .204
HOLD . . . . . . . . . . . . . . . . . . . . . . . . . .245
Display message . . . . . . . . . . . . . .322
HomeLink ®
see Garage door opener I
Immobiliser . . . . . . . . . . . . . . . . . . . . .54
Indicator and warning lamp Automatic child seat recognition
(malfunction ).. . . . . . . . . . . . . . . .350
Brakes (red ).. . . . . . . . . . . . .352, 354
Brakes (yellow) . . . . . . . . . . . . . . . .354 Engine diagnostics . . . . . . . . . . . .
.354
ESP ®
. . . . . . . . . . . . . . . . . . . . . . .352
PASSENGER AIRBAG OFF . . . .44, 350
Reserve fuel . . . . . . . . . . . . . . . . . .356
Seat belt . . . . . . . . . . . . . . . . . . . . .355
SRS . . . . . . . . . . . . . . . . . . . . .37, 353
Indicator lamp
Display message . . . . . . . . . . . . . .344
see Indicator and warning lamp . . .351
Instrument cluster . . . . . . . . . . . . ..212
Overview . . . . . . . . . . . . . . . . . . . . .27
Intelligent Light System . . . . . . . . ..197
Display message . . . . . . . . . .323, 346
Menu (on-board computer) . . . . . .225
Tourist mode . . . . . . . . . . . . . . . . .225
Interior lighting
Ambient light (COMAND) . . . . . . . .166
Automatic control system . . . . . . .199
Emergency lighting . . . . . . . . . . . .199
Interior lighting . . . . . . . . . . . . . . . .166
Manual control . . . . . . . . . . . . . . . .198
Reading lamp . . . . . . . . . . . . . . . . .198
Interior motion sensor . . . . . . ..55, 167
ISOFIX child seat securing system ..47 J
Jack Operation . . . . . . . . . . . . . . . . . . . .378
Storage location . . . . . . . . . . . . . . .315
Jump-starting . . . . . . . . . . . . . . . . . . .384
Jump leads . . . . . . . . . . . . . . . . . . .384 K
Key . . . . . . . . . . . . . . . . . . . . . . . . . . .178
Checking the battery . . . . . . . . . . .367
Convenience closing . . . . . . . . . . .201
Convenience opening . . . . . . . . . . .201
Display message . . . . . . . . . . . . . .340
Loss . . . . . . . . . . . . . . . . . . . . . . . .363
Malfunction . . . . . . . . . . . . . . . . . .362
Modifying the programming . . . . . .179
KEYLESS GO
Button . . . . . . . . . . . . . . . . . . . . . .182
Changing the battery . . . . . . . . . . .368
Checking the battery . . . . . . . . . . .367
Convenience closing . . . . . . . . . . .202 10
Index 216_AKB; 2; 3, en-GB
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Oil
Consumption . . . . . . . . . . . . . . . . .293
Topping up . . . . . . . . . . . . . . . . . . .294
Oil level
Checking (dipstick) . . . . . . . . . . . .294
Checking (on-board computer) . . .293
On-board computer . . . . . . . . . . . . ..213
AMG menu . . . . . . . . . . . . . . . . . . .220
Assistance menu . . . . . . . . . . . . . .223
Audio menu . . . . . . . . . . . . . . . . . .218
Display messages . . . . . . . . . . . . .316
Navi menu . . . . . . . . . . . . . . . . . . .217
Overview . . . . . . . . . . . . . . . . . . . .214
Service menu . . . . . . . . . . . . . . . . .225
Settings menu . . . . . . . . . . . . . . . .225
Telephone menu . . . . . . . . . . . . . .222
Trip menu . . . . . . . . . . . . . . . . . . . .215
Opening limiter for boot lid . . . . . ..168
Operating system see On-board computer . . . . . . . . .213
Outside lighting
Delayed switch-off (COMAND) . . . .166
Outside temperature display . . . ..212
Override feature Rear side windows . . . . . . . . . . . . . .48P
Paint code . . . . . . . . . . . . . . . . . . . . . .396
Paintwork Cleaning . . . . . . . . . . . . . . . . . . . . .308
Park Assist . . . . . . . . . . . . . . . . . . . . .251
Activating/deactivating . . . . . . . . .253
Display message . . . . . . . . . . . . . .324
Sensor range . . . . . . . . . . . . . . . . .252
Warning messages . . . . . . . . . . . . .253
Parking . . . . . . . . . . . . . . . . . . . . . . . .204
Parking aid Exterior mirror on the front-
passenger sid e.. . . . . . . . . . . . . . .191
Park Assist . . . . . . . . . . . . . . . . . . .251
PARKTRONI C.. . . . . . . . . . . . . . . .249
Reversing camera . . . . . . . . . . . . .257
Parking brake
Display message . . . . . . . . . . . . . .334
Electric parking brake . . . . . . . . . .205
Parking Guidance . . . . . . . . . . . . . ..254
Display message . . . . . . . . . . . . . .324 Parking lamps
Display message . . . . . . . . . . . . . .345
Parking position
Exterior mirror on the front-
passenger sid e.. . . . . . . . . . . . . . .191
Exterior mirrors (COMAND) . . . . . .165
PARKTRONIC . . . . . . . . . . . . . . . . . . .249
Activating/deactivating . . . . . . . . .251
Malfunction . . . . . . . . . . . . . . . . . .360
Range of the sensors . . . . . . . . . . .250
Warning display . . . . . . . . . . . . . . .251
PASSENGER AIRBAG OFF warning
lamp . . . . . . . . . . . . . . . . . . . . . . .44, 350
Pause function COMAND (Audio) . . . . . . . . . . . . . . .81
PCMCIA card
Operation (on-board computer) . . .219
Permanent four-wheel drive
see 4MATIC
Permanent Speedtronic . . . . . . . . ..245
Petrol Minimum grade . . . . . . . . . . . . . . .291
see Fuel
Phone book
Calling up . . . . . . . . . . . . . . . . . . . .120
Creating an entry . . . . . . . . . . . . . .121
Deleting an entry . . . . . . . . . . . . . .122
Plastic trim
Cleaning . . . . . . . . . . . . . . . . . . . . .312
Playback options . . . . . . . . . . . ..97, 103
Playback options (COMAND) . . . . . ..83
Power closing feature . . . . . . . . . . ..180
Power socket Boot . . . . . . . . . . . . . . . . . . . . . . . .282
Power window switch
see Side windows
Pre-emptive occupant safety system
see PRE-SAFE ®
PRE-SAFE ®
Brake (vehicles with
Distronic Plus) . . . . . . . . . . . . . . . . . . .52
Activating/deactivating (on-
board computer) . . . . . . . . . . . . . .224
PRE-SAFE ®
system . . . . . . . . . . . . . . . .42
Display message . . . . . . . . . . . . . .325
Programmable button . . . . . . . . . . ..163
Program selector button Automatic transmission . . . . . . . . .210 Index
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Sensors
Cleaning . . . . . . . . . . . . . . . . . . . . .310
Service indicator
see Service interval display . . . . . .306
Service products . . . . . . . . . . . . . . . .396
Brake fluid . . . . . . . . . . . . . . . . . . .400
Coolant . . . . . . . . . . . . . . . . . . . . .399
Engine oil . . . . . . . . . . . . . . . . . . . .398
Fuel . . . . . . . . . . . . . . . . . . . . . . . .397
Settings
Calling up a stored setting . . . . . . .190
On-board computer . . . . . . . . . . . .225
Setting the air distribution
COMAND . . . . . . . . . . . . . . . . . . . .169
Shift ranges
Automatic transmission . . . . . . . . .209
Sidebag . . . . . . . . . . . . . . . . . . . . . . . . .41
Side windows Convenience closing . . . . . . . . . . .201
Convenience opening . . . . . . . . . . .201
Fault . . . . . . . . . . . . . . . . . . . . . . . .361
Opening/closing . . . . . . . . . . . . . .200
Skibag . . . . . . . . . . . . . . . . . . . . . . . . .278
Sliding/tilting sunroof . . . . . . . . . ..274
Convenience closing . . . . . . . . . . .201
Convenience opening . . . . . . . . . . .201
Rain closing feature . . . . . . . . . . . .275
Resetting . . . . . . . . . . . . . . . . . . . .275
Sliding sunroof
see Sliding/tilting sunroof
Snow chains . . . . . . . . . . . . . . . . . . . .303
Socket . . . . . . . . . . . . . . . . . . . . . . . . .282
Cockpit . . . . . . . . . . . . . . . . . . . . . .282
Sound settings . . . . . . . . . . . . . . . . . . .63
Spare wheel Fitting. . . . . . . . . . . . . . . . . . . . . . .378
Technical data . . . . . . . . . . . . . . . .407
Special destination
Entry . . . . . . . . . . . . . . . . . . . . . . . .147
Spectacles compartment . . . . . . . ..276
Speed limiter Speedtronic . . . . . . . . . . . . . . . . . .242
Speedometer
Additional speedometer (on-
board computer) . . . . . . . . . .216, 226
Selecting the display unit (on-
board computer) . . . . . . . . . . . . . .226 Speedtronic
. . . . . . . . . . . . . . . . . . . .242
Display message . . . . . . . . . .320, 329
Permanent . . . . . . . . . . . . . . . . . . .245
Variabl e.. . . . . . . . . . . . . . . . . . . .243
SRS (Supplemental Restraint Sys-
tem) . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
Display message . . . . . . . . . . . . . .338
Warning lamp . . . . . . . . . . . . . .37, 353
Steering wheel
Adjusting . . . . . . . . . . . . . . . . . . . .188
Buttons (on-board computer) . . . . .213
Storing settings . . . . . . . . . . . . . . .190
Steering wheel boss
Cleaning . . . . . . . . . . . . . . . . . . . . .310
Steering wheel heating . . . . . . . . . ..188
Stowage compartments . . . . . . . . ..275
Armrest (under) . . . . . . . . . . . . . . .277
Centre console . . . . . . . . . . . . . . . .276
Cup holder . . . . . . . . . . . . . . . . . . .277
Glove compartment . . . . . . . . . . . .276
Rea r.. . . . . . . . . . . . . . . . . . . . . . .277
Rear seat armrest . . . . . . . . . . . . .277
Rear seats (between) . . . . . . . . . . .277
Stowage well
Boot floor (underneath) . . . . . . . . .280
Summer opening
see Convenience opening
Sun visor . . . . . . . . . . . . . . . . . . . . . . .280
Supplemental Restraint System See SRS . . . . . . . . . . . . . . . . . . . . . .37
Suspension tuning . . . . . . . . ..247, 248
Switching off the alarm ATA . . . . . . . . . . . . . . . . . . . . . . . . . .55
System settings (COMAND)
Display . . . . . . . . . . . . . . . . . . . . . .161
Linguatronic settings . . . . . . . . . . .162
Menu overview . . . . . . . . . . . . . . . .160
Programmable button . . . . . . . . . .163
Reset . . . . . . . . . . . . . . . . . . . . . . .163
Setting the system language . . . . .163
Time settings . . . . . . . . . . . . . . . . .161 T
Tail pipes Cleaning . . . . . . . . . . . . . . . . . . . . .310
Tank
see Fuel tank Index
15 216_AKB; 2; 3, en-GB
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ABS (Anti-lock Braking System)
ABS regulates brake pressure in such a way
that the wheels do not lock when you brake.
This allows you to continue steering the vehi-
cle when braking.
ABS works from a speed of about 8 km/h
upwards, regardless of road-surface condi-
tions. ABS works on slippery surfaces, even
when you only brake gently. G
Risk of accident
Do not depress the brake pedal several times
in quick succession (pumping). Depress the
brake firmly and evenly. Pumping the brake
pedal reduces the braking effect.
Braking If ABS intervenes when braking, you will feel
a pulsing in the brake pedal.
X If ABS intervenes: continue to depress the
brake pedal with force until the braking sit-
uation is over.
X To make a full brake application:
depress the brake pedal with full force. G
Risk of accident
If ABS is faulty, the wheels could lock when
braking. This limits the steerability of the vehi-
cle when braking and the braking distance
may increase.
If ABS is deactivated due to a malfunction,
then BAS, BAS PLUS* and ESP ®
are also
deactivated. There is an increased risk of your
vehicle skidding in certain situations.
You should always adapt your driving style to
suit prevailing road and weather conditions. BAS (Brake Assist)
BAS operates in emergency braking situa-
tions. If you depress the brake pedal quickly,
BAS automatically boosts the braking force,
thus shortening the stopping distance. X
Keep 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. G
Risk of accident
If BAS has malfunctioned, the braking system
remains available with full brake boosting
effect. However, braking force is not auto-
matically increased in emergency braking sit-
uations and the stopping distance may
increase. BAS PLUS* (Brake Assist Plus)
BAS PLUS provides braking assistance in haz-
ardous situations and uses radar sensor tech-
nology to assess the traffic situation. G
Risk of accident
BAS PLUS is only an aid to assist you when
driving. You are responsible for maintaining a
safe distance from other vehicles, for the vehi-
cle's speed and for braking in good time.
Always pay attention to the traffic conditions.
You may otherwise recognise dangers too
late, cause an accident and injure yourself
and others.
BAS PLUS can detect obstacles that are in the
path of your vehicle for an extended period of
time. Should you approach a detected obsta-
cle quickly, BAS PLUS calculates the braking
force necessary to avoid a rear-end collision.
Should you additionally apply the brakes, BAS
PLUS will automatically increase the braking
force to a level suitable for the traffic condi-
tions.
If BAS PLUS demands particularly high brak-
ing force, PRE-SAFE ®
is activated simultane-
ously.
X Keep the brake pedal depressed until the
emergency braking situation is over.
ABS prevents the wheels from locking. Driving safety systems
49Safety
* optional
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Page 53 of 421
The brakes will work normally again when:
R you release the brake pedal
R no obstacle is detected in front of your
vehicle
R there is no longer any danger of a rear-end
collision
BAS PLUS is then deactivated.
At speeds up to approximately 70 km/h, BAS
PLUS can also detect stationary obstacles,
for example, stopped or parked vehicles.
Vehicles with COMAND and a navigation sys-
tem*: the radar sensor system is switched off
automatically in the vicinity of radio telescope
facilities (Y page 411).
For BAS PLUS to assist you when driving, the
radar sensor system must be switched on and
operational. You can check this by activating
Distronic Plus* (Y page 235) or via the
"Radar sensor" menu in the on-board com-
puter (Y page 226). G
Risk of accident
Only clearly identified obstacles will initiate
braking assistance by BAS PLUS. In particular,
the detection of obstacles can be restricted if
there is:
R dirt on the sensors or the sensors are cov-
ered
R snow or heavy rain
R interference by other radar sources
R strong radar reflections, for example in
multi-storey garages
BAS PLUS does not react to people or ani-
mals, oncoming vehicles and crossing traffic.
BAS PLUS may not detect narrow vehicles
such as motorcycles and vehicles driving on
a different line.
Following a collision or crash-related damage
to the front end of the vehicle, have the con-
figuration and operation of the radar sensors
checked at a Mercedes-Benz Service Centre.
If BAS PLUS is not available due to a malfunc-
tion in the radar sensor system, the braking system remains available with full brake
boosting effect and BAS. Adaptive brake lamps
i Adaptive brake lamps are only available in
certain countries.
If you brake sharply from a speed of more
than 50 km/h or if braking is assisted by BAS
or BAS PLUS*, the brake lamps flash rapidly.
In this way, traffic travelling behind you is
warned in an even more noticeable manner.
If you brake sharply from a speed of more
than 70 km/h to a standstill, the hazard warn-
ing lamps are activated automatically. If the
brakes are applied again, the brake lamps
light up continuously. The hazard warning
lamps switch off automatically if you travel
faster than 10 km/h. You can also switch off
the hazard warning lamps using the hazard
warning switch button (Y page 196). ESP
®
(Electronic Stability Program)
ESP ®
monitors driving stability and traction,
i.e. power transmission between tyres 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 stabilise the
vehicle. If necessary, the engine output is also
modified to keep the vehicle on the desired
course within physical limits. ESP ®
assists
the driver when pulling away on wet or slip-
pery roads. ESP ®
can also stabilise the vehi-
cle when braking.
When ESP ®
intervenes, the ÷warning
lamp flashes in the instrument cluster. G
Risk of accident
If the ÷ warning lamp in the instrument
cluster flashes, proceed as follows: 50
Driving safety systemsSafety
* optional
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Page 56 of 421
G
Risk of accident
Pay particular attention to the traffic condi-
tions if the distance warning lamp ·in the
instrument cluster lights up or an intermittent
warning tone sounds. If necessary, brake or
manoeuvre to avoid an obstacle.
In addition, at speeds of around 30 km/h or
more, PRE-SAFE ®
Brake can:
R brake the vehicle gently and automatically
within a speed range of up to around
180 km/h
R trigger preventative passenger protection
measures (PRE-SAFE ®
) G
Risk of accident
PRE-SAFE ®
Brake is only an aid to assist you
when driving. You are responsible for main-
taining a safe distance from other vehicles,
the vehicle's speed and for braking in good
time. Always pay attention to the traffic con-
ditions. Otherwise, you may recognise dan-
gers too late, cause an accident and injure
yourself and others.
With the help of the radar sensor system,
PRE-SAFE ®
Brake can detect obstacles that
are in front of your vehicle for an extended
period of time. If you approach an obstacle
and PRE-SAFE ®
Brake detects a risk of a col-
lision, the system will initially alert you both
visually and acoustically. If you do not brake
or steer, the vehicle will automatically brake
slightly. In the event of an increased risk of a
collision, PRE-SAFE ®
is activated
(Y page 42). G
Risk of accident
Only clearly detected obstacles will trigger a
warning and initiate braking assistance by
PRE-SAFE ®
Brake. In particular, the detection of obstacles may
be restricted if there is:
R
dirt on the sensors or the sensors are cov-
ered
R snow or heavy rain
R interference from other radar sources
R strong radar reflections, for example in
multi-storey car parks
PRE-SAFE ®
Brake does not react to persons,
animals, oncoming vehicles and crossing traf-
fic.
PRE-SAFE ®
Brake may not detect narrow
vehicles such as motorcycles or vehicles driv-
ing on a different line. G
Risk of accident
Depending on the vehicle's speed, PRE-
SAFE ®
Brake will brake your vehicle up to
maximum of 4 m/s 2
. This is equivalent to
approximately 40 % of the maximum braking
power of the vehicle. You must also apply the
brakes yourself to avoid a collision.
In order to maintain the appropriate distance
to the vehicle in front and thus prevent a
crash, you must apply the brakes yourself.
At speeds up to approximately 70 km/h,
PRE-SAFE ®
Brake can also detect stationary
obstacles, for example stopped or parked
vehicles. G
Risk of accident
If, in a critical driving situation, you do not
receive a visual and acoustic warning:
R PRE-SAFE ®
Brake did not detect the risk of
a collision
R PRE-SAFE ®
Brake is deactivated
R PRE-SAFE ®
Brake has failed
You must then brake to avoid a collision. Driving safety systems
53Safety
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Page 57 of 421
X
To activate/deactivate: activate or deac-
tivate PRE-SAFE ®
Brake in the on-board
computer (Y page 224).
After activation, the Äsymbol is dis-
played on the left in the driver display.
Vehicles with COMAND and a navigation sys-
tem*: the radar sensor system is switched off
automatically in the vicinity of radio telescope
facilities (Y page 411).
For PRE-SAFE ®
Brake to assist you when driv-
ing, the radar sensor system must be
switched on and operational.
PRE-SAFE ®
Brake does not always clearly
identify complex traffic situations properly.
You can terminate the intervention of PRE-
SAFE ®
Brake in a non-critical driving situation
at any time if:
R an acoustic and visual warning occurs
R the vehicle brakes gently
To end this you can either depress the accel-
erator pedal further, activate kickdown or
release the brake pedal.
The braking intervention of PRE-SAFE ®
Brake
is ended automatically if:
R you manoeuvre to avoid the obstacle.
R you drive slower than approximately
15 km/h.
R there is no longer an obstacle detected in
front of your vehicle.
R there is no longer any danger of a collision.
i While Distronic Plus is activated, PRE-
SAFE ®
Brake remains passive.
Following a collision or crash-related damage
to the front end of the vehicle, have the con-
figuration and operation of the radar sensors
checked. Choose a qualified specialist work-
shop for this which has the necessary spe-
cialist knowledge and tools for the work
required. Mercedes-Benz recommends that
you use a Mercedes-Benz Service Centre for
this purpose. Anti-theft systems
Immobiliser
The immobiliser prevents your vehicle from
being started without the correct key.
Activating the immobiliser X
With the key: remove the key from the
ignition lock.
X With KEYLESS GO*: press the start/stop
button on the dashboard.
The engine switches off.
Deactivating the immobiliser X
With the key: turn the key to position 2in
the ignition lock.
X With KEYLESS GO*: press the start/stop
button on the dashboard twice without
depressing the brake.
i The immobiliser is always deactivated
when you start the engine. ATA* (anti-theft alarm system)
A visual and audible alarm is triggered when
the alarm system is primed and you open:
R a door
R a door using the emergency key element
R the boot lid
R the bonnet
The alarm is not switched off even if you close
an open door again. 54
Anti-theft systemsSafety
* optional
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