2019 MERCEDES-BENZ GLC brake sensor

BAS .................................................. 66
Brake fluid (notes) ......................... 361
Display message............................ 228
EBD .................................................. 72
Hill start assist ............................... 135
HOLD function ............................... 170
Important safety notes .................. 157
Maintenance .................................. 158
Parking brake ................................ 154
Riding tips ...................................... 157
Warning lamp ................................. 258
Breakdown assistance
Where will I find...? ........................ 313
see Flat tire
see Towing away
Brightness control (instrument
cluster lighting)................................... 35
Buttons on the steering wheel......... 209
C
California
Important notice for retail cus-
tomers and lessees .......................... 28
Calling up a malfunction
see Display messages
Calling up the climate control bar
Multimedia system ........................ 273
Calling up the climate control
menu
Multimedia system ........................ 273
Camera
see 360° camera
see Rear view camera
Car
see Vehicle
Car wash
see Care
Care
360° camera ................................. 309
Car wash ........................................ 305
Carpets .......................................... 312
Display ........................................... 310
Exhaust pipe .................................. 309
Exterior lights ................................ 308
General notes ................................ 305
Interior ........................................... 310
Matte finish ................................... 307
Paint .............................................. 307
Plastic trim .................................... 310
Power washer ................................ 306
Rear view camera .......................... 309
Roof lining ...................................... 312
Seat belt ........................................ 311
Seat cover..................................... 311
Selector lever ................................ 311
Sensors ......................................... 309
Side running board ........................ 309
Steering wheel ............................... 311
Trim pieces .................................... 311
Washing by hand ........................... 306
Wheels ........................................... 308
Windows ........................................ 308
Wiper blades .................................. 308
Wooden trim .................................. 311
Cargo compartment
Opening/closing (from outside,
HANDS-FREE ACCESS) .................... 87
Plug-in module (telescopic rods) .... 286
Cargo compartment cover
Important safety notes .................. 284
Notes/how to use ......................... 284
Cargo compartment enlargement... 281
Cargo compartment floor
Important safety notes .................. 287
Locking and unlocking ................... 288
Opening/closing ............................ 287
Stowage well (under)..................... 287
Cargo compartment plug-in mod-
ule (telescope bars).......................... 286
Cargo tie down rings......................... 283
CD
see also Digital Operator's Man-
ual .................................................. 268
CD player (on-board computer)........ 217
Center console
Lower section (Mercedes-AMG
vehicles) .......................................... 40
Upper section .................................. 38
Central locking
Locking/unlocking (SmartKey)........ 77
Change of address.............................. 29
Change of ownership.......................... 29
Changing the media source............. 216
Index7

Driving system ............................... 179
Function/notes............................. 179
Important safety notes .................. 179
Problems (malfunctions) ................ 182
Sensor range ................................. 180
Warning display ............................. 181
Parking assistance
see Parking Assist PARKTRONIC
Parking brake
Applying automatically................... 154
Applying or releasing manually ...... 154
Display message ............................ 230
Electric parking brake .................... 154
Emergency braking ........................ 155
General notes ................................ 154
Releasing automatically................. 155
Warning lamp ................................. 262
Parking lamps
Switching on/off........................... 110
PASSENGER AIR BAG
Display message ............................ 237
Indicator lamps ................................ 44
Problems (malfunction) .................. 237
Perfume atomizer
Operating ....................................... 127
Problem (malfunction) ................... 128
Setting the perfume intensity
(multimedia system) ...................... 273
Vial ................................................ 127
Permanent all-wheel drive
see 4MATIC (permanent four-
wheel drive)
Pets in the vehicle............................... 64
Phone book
see also Digital Operator's Man-
ual .................................................. 268
Plastic trim (cleaning instruc-
tions).................................................. 310
Power washers.................................. 306
Power windows
see Side windows
PRE-SAFE®(anticipatory occupant
protection)
Display message ............................ 234
Operation ......................................... 57
PRE-SAFE®PLUS (anticipatory
occupant protection PLUS)
Operation ......................................... 58
Program
see Drive programs
Protection against theft
ATA (Anti-Theft Alarm system)......... 75
Immobilizer ...................................... 75
Protection of the environment
General notes .................................. 27
Pulling away
Automatic transmission ................. 134
General notes ................................ 134
Hill start assist ............................... 135
Trailer ............................................ 135
Q
QR code
Mercedes-Benz Guide App ................. 1
Rescue card ..................................... 32
Qualified specialist workshop........... 31
Quick access for audio and tele-
phone
Changing the station/music
track .............................................. 271
R
RACE START (Mercedes-AMG vehi-
cles).................................................... 171
RACE TIMER (on-board computer,
Mercedes-AMG vehicles).................. 225
Radar sensor system
Display message ............................ 235
Radiator cover................................... 300
Radio
Selecting a station ......................... 216
Radio mode
see also Digital Operator's Man-
ual.................................................. 268
Radio-wave reception/transmis-
sion in the vehicle
Declaration of conformity ................ 30
Reading lamp..................................... 113
Rear compartment
Setting the air vents ...................... 129
Setting the airflow ......................... 124
Index17

Search & Send
see also Digital Operator's Man-
ual .................................................. 268
Seat
Correct driver's seat position ........... 96
Seat belts
Adjusting the driver's and front-
passenger seat belt .........................47
Adjusting the height ......................... 47
center rear-compartment seat......... 47
Cleaning ......................................... 311
Correct usage .................................. 46
Fastening ......................................... 47
Important safety guidelines ............. 45
Introduction ..................................... 44
Releasing ......................................... 47
Warning lamp ................................. 257
Warning lamp (function) ................... 48
Seats
Adjusting (AMG Performance
Seat) .............................................. 100
Adjusting (electrically) ..................... 98
Adjusting the 4-way lumbar sup-
port ................................................ 100
Adjusting the head restraint ............ 98
Calling up a stored setting (mem-
ory function) .................................. 107
Cleaning the cover ......................... 311
Folding the backrest (rear com-
partment) forwards/back .............. 281
Important safety notes .................... 96
Seat heating .................................. 100
Seat heating problem .................... 101
Seat ventilation .............................. 101
Seat ventilation problem ................ 101
Storing settings (memory func-
tion) ............................................... 107
Securing a load
see Securing cargo
Securing cargo.................................. 283
Selecting a gear
see Automatic transmission
Selector lever
Cleaning ......................................... 311
see Automatic transmission
Sensors (cleaning instructions)....... 309
Service menu (on-board com-
puter).................................................. 219
Service message
see ASSYST PLUS
Service products
Brake fluid ..................................... 361
Coolant (engine) ............................ 361
Engine oil ....................................... 360
Fuel ................................................ 358
Important safety notes .................. 358
Refrigerant (air-conditioning sys-
tem) ............................................... 362
Washer fluid ................................... 362
Setting the date/time format
see also Digital Operator's Man-
ual .................................................. 268
Setting the language
see also Digital Operator's Man-
ual .................................................. 268
Setting the time
see also Digital Operator's Man-
ual .................................................. 268
Settings
Factory (on-board computer) ......... 223
On-board computer ....................... 219
SETUP (on-board computer,
Mercedes-AMG vehicles).................. 224
Side impact air bag............................. 50
Side marker lamp (display mes-
sage)................................................... 239
Side running board
Cleaning ......................................... 309
Side windows
Cleaning ......................................... 308
Convenience closing feature ............ 91
Convenience opening feature .......... 91
Important safety information ........... 89
Opening/closing .............................. 90
Problem (malfunction) ..................... 92
Resetting ......................................... 92
Reversing feature ............................. 90
SIRIUS services
see also Digital Operator's Man-
ual .................................................. 268
Ski and snowboard bag.................... 280
Sliding sunroof
Important safety notes .................... 93
Opening/closing .............................. 93
Problem (malfunction) ..................... 94
Resetting ......................................... 94
Index19

PRE-SAFE®takes the following measuresdepending on the hazardous situation detected:
Rthe front seat belts are pre-tensioned.
Rif the vehicle skids, the side windows and thesliding sunroof are closed.
Rvehicles with the memory function for thefront-passenger seat: the front-passengerseat is adjusted if it is in an unfavorable posi-tion.
If the hazardous situation passes without result-
ing in an accident, PRE-SAFE®slackens the belt
pre-tensioning. All settings made by PRE-SAFE®
can then be reversed.
If the seat belt pre-tensioning is not reduced:
XMove the seat backrest or seat back slightlywhen the vehicle is stationary.The seat belt pre-tensioning is reduced andthe locking mechanism is released.
The seat-belt adjustment is an integral part of
the PRE-SAFE®convenience function. Informa-tion about the convenience function can befound under "Belt adjustment" (Ypage 47).
PRE-SAFE®PLUS (anticipatory occu-
pant protection system PLUS)
Introduction
PRE-SAFE®PLUS is only available in vehicleswith the Driving Assistance package.
Using the radar sensor system, PRE-SAFE®
PLUS is able to detect that a frontal or rear-endcollision is imminent. In certain hazardous sit-
uations, PRE-SAFE®PLUS takes pre-emptivemeasures to protect the vehicle occupants.
Important safety notes
The intervention of PRE-SAFE®PLUS cannotprevent an imminent collision.
The driver is not warned about the intervention
of PRE-SAFE®PLUS.
PRE-SAFE®PLUS does not intervene:
Rif the vehicle is backing up
Rwhen the vehicle is towing a trailer and thereis a risk of a rear-end collision
When driving, or when parking or exiting a park-ing space using Active Parking Assist, PRE-
SAFE®PLUS will not apply the brakes.
Function
PRE-SAFE®PLUS intervenes in certain situa-tions if the radar sensor system detects animminent frontal or rear-end collision.
PRE-SAFE®PLUS takes the following measuresdepending on the hazardous situation detected:
Rif the radar sensor system detects that ahead-on collision is imminent, the seat beltsare pre-tensioned.
Rif the radar sensor system detects that a rear-end collision is imminent:
-the brake pressure is increased if the driverapplies the brakes when the vehicle is sta-tionary.
-the seat belts are pre-tensioned.
The PRE-SAFE®PLUS braking application is can-celed:
Rif the accelerator pedal is depressed when agear is engaged
Rif the risk of a collision passes or is no longerdetected
Rif Active Distance Assist DISTRONIC indicatesan intention to intervene
If the hazardous situation passes without result-ing in an accident, the original settings arerestored.
Automatic measures after an acci-
dent
Immediately after an accident, the followingmeasures are implemented, depending on thetype and severity of the impact:
Rthe hazard warning lamps are switched on
Rthe emergency lighting is activated
Rthe vehicle doors are unlocked
Rthe front side windows are lowered
Rvehicles with a memory function: the electri-cally adjustable steering wheel is raised whenthe driver's door is opened
Rthe engine is switched off and the fuel supplyis cut off
Rvehicles with mbrace: automatic emergencycall
58Occupant safety
Safety

BAS (Brake Assist System)
General information
BAS operates in emergency braking situations.If you depress the brake pedal quickly, BASautomatically boosts the braking force, thusshortening the stopping distance.
Important safety notes
iObserve the "Important safety notes" sec-tion (Ypage 65).
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 untilthe emergency braking situation is over.ABS prevents the wheels from locking.
The brakes will function as usual once yourelease the brake pedal. BAS is deactivated.
Active Brake Assist
General information
iObserve the "Important safety notes" sec-tion (Ypage 65).
Active Brake Assist consists of a distance warn-ing function with an autonomous braking func-tion and Adaptive Brake Assist.
Active Brake Assist can help you to minimize therisk of a collision with the vehicle traveling infront or reduce the effects of such a collision.
If Active Brake Assist detects that there is a riskof collision, you will be warned visually andacoustically. If you do not react to the visual andaudible collision warning, autonomous brakingcan be initiated in critical situations. If you applythe brake yourself in a critical situation, Adap-tive Brake Assist of the Active Brake Assist sys-tem supports you.
Important safety notes
In particular, the detection of obstacles can beimpaired if:
RThere is dirt on the sensors or anything elsecovering 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. amotorbike
RA vehicle is traveling in front on a different line
RYou are driving a new vehicle or servicing onthe Active Brake Assist system has just beencarried out
Observe the important safety notes in the"Breaking-in notes" section (Ypage 130).
Following damage to the front end of the vehicle,have the configuration and operation of theradar sensor checked at a qualified specialistworkshop. This also applies to collisions at slowspeeds where there is no visible damage to thefront of the vehicle.
Activating/deactivating
Active Brake Assist is automatically active afterswitching on the ignition.
You can activate or deactivate Active BrakeAssist (Ypage 220) in the on-board computer.When deactivated, the distance warning func-tion and the autonomous braking function arealso deactivated.
If Active Brake Assist is deactivated, the

reacting to moving objects that have alreadybeen detected as such at least once over theperiod 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 particularlyhigh braking force, preventative passenger pro-
tection measures (PRE-SAFE®) are activatedsimultaneously (Ypage 57).
XKeep the brake pedal depressed until theemergency 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 vehicle
Adaptive Brake Assist is then deactivated.
Important safety notes
iObserve the "Important safety notes" sec-tion for driving safety systems (Ypage 65).
GWARNING
Adaptive Brake Assist cannot always clearly
identify objects and complex traffic situa-
tions.
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.
Always adapt your speed to suit the prevailing
road and traffic conditions.
Due to the nature of the system, particularlycomplicated but non-critical driving conditionsmay also cause Brake Assist to intervene.
If adaptive Brake Assist is not available due to amalfunction in the radar sensor system, thebrake system remains available with full brakeboosting effect and BAS.
ESP®(Electronic Stability Program)
General notes
iObserve the "Important safety notes" sec-tion (Ypage 65).
ESP®monitors driving stability and traction, i.e.power transmission between the tires and theroad surface.
If ESP®detects that the vehicle is deviating fromthe direction desired by the driver, one or morewheels are braked to stabilize the vehicle. Theengine 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 stabilizethe vehicle during braking.
4ETS (Electronic Traction System)
iObserve the "Important safety notes" sec-tion (Ypage 65).
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 pullaway and accelerate on slippery surfaces, forexample if the road surface is slippery on oneside. 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 65).
68Driving safety systems
Safety

Crosswind Assist is active at vehicle speedsabove 50 mph(80 km/h)when driving straightahead or cornering gently.
Important safety notes
Crosswind Assist does not work if ESP®isswitched off or deactivated because of a mal-function.
EBD (electronic brake force distribu-
tion)
General information
EBD monitors and controls the brake pressureon the rear wheels to improve driving stabilitywhile braking.
Important safety notes
iObserve the "Important safety notes" sec-tion (Ypage 65).
GWARNING
If EBD is malfunctioning, the rear wheels can
lock, e.g. under full braking. This increases the
risk of skidding and an accident.
You should therefore adapt your driving style
to the different handling characteristics. Have
the brake system checked at a qualified spe-
cialist workshop.
Observe information regarding indicator andwarning lamps (Ypage 259) as well as displaymessages (Ypage 230).
ADAPTIVE BRAKE
ADAPTIVE BRAKE enhances braking safety andoffers increased braking comfort. In addition tothe braking function, ADAPTIVE BRAKE also hasthe HOLD function (Ypage 170) and hill startassist (Ypage 135).
Active Brake Assist with cross-traffic
function
General information
iObserve the important safety notes in the"Driving safety systems" section (Ypage 65).
Active Brake Assist with cross-traffic functioncan help you to minimize the risk of a collisionwith a vehicle in front or a pedestrian and reducethe effects of such a collision. If the Active BrakeAssist with cross-traffic function detects a riskof collision, you will be warned visually andacoustically and, if necessary, your brake appli-cation will be assisted according to the situa-tion. If you do not react, the system can alsoreact by braking automatically. In the event of adetected risk of collision due to crossing traffic,you will also be visually and acoustically warnedas well as assisted by the brake boosting effectaccording to the situation.
Active Brake Assist with cross-traffic function isonly available in vehicles with the Driving Assis-tance Plus package.
For Active Brake Assist with cross-traffic func-tion to assist you when driving, the radar sensorsystem and the camera system must be opera-tional.
If the radar sensor system or the camera systemis malfunctioning, Active Brake Assist withcross-traffic function is restricted or no longeravailable. The brake system is still available withcomplete brake boosting effect and BAS.
The radar sensor system and camera systemhelp Active Brake Assist with cross-traffic func-tion to detect obstacles that are in the path ofyour vehicle for an extended period of time.
In addition, pedestrians in the path of your vehi-cle can be detected.
Active Brake Assist with cross-traffic functiondetects pedestrians using typical characteris-tics such as body contours and the posture of aperson standing upright.
iObserve the restrictions described in the"Important safety notes" section(Ypage 72).
Important safety notes
GWARNING
Active Brake Assist with cross-traffic function
will initially brake your vehicle by a partial
72Driving safety systems
Safety

application of the brakes if a danger of colli-
sion is detected. There may be a collision
unless you brake yourself. Even after subse-
quent full application of the brakes a collision
cannot always be avoided, particularly when
approaching at too high a speed. There is a
risk of an accident.
Always apply the brakes yourself and try to
take evasive action, provided it is safe to do
so.
In the event of a partial application of the brakes,the vehicle is braked with up to 50% of the fullbraking pressure.
GWARNING
Active Brake Assist with cross-traffic function
cannot always clearly identify objects and
complex traffic situations.
In such cases, Active Brake Assist with cross-
traffic function might:
Rissue an unnecessary warning or engage
Rneither give a warning nor intervene
There is a risk of an accident.
Always pay particular attention to the traffic
situation and be prepared to brake, especially
if Active Brake Assist with cross-traffic func-
tion alerts you. Terminate the intervention in a
non-critical driving situation.
GWARNING
Active Brake Assist with cross-traffic function
cannot always clearly identify people, partic-
ularly if they are moving. Active Brake Assist
with cross-traffic function cannot intervene in
these cases. There is a risk of an accident.
Always pay particular attention to the traffic
situation and be prepared to brake, especially
if Active Brake Assist with cross-traffic func-
tion alerts you.
In order to maintain the appropriate distance tothe vehicle in front and thus prevent a collision,you must apply the brakes yourself.
GWARNING
Active Brake Assist with cross-traffic function
does not react:
Rto small people, e.g. children
Rto animals
Rto oncoming vehicles
Rwhen cornering
As a result, Active Brake Assist with cross-
traffic function may not warn you or engage in
all critical 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 alsoimpaired if:
Rthere is dirt on the sensors or anything elsecovering 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. amotorbike
Ra vehicle is traveling in front on a different line
Rvehicles moving quickly into the radar sensorsystem detection range
Recognition by the camera system is alsoimpaired in the event of:
Rdirt on the camera or if the camera is covered
Rglare on the camera system, e.g. from the sunbeing low in the sky
Rdarkness
Ror if:
-pedestrians move quickly, e.g. into the pathof the vehicle
-the camera system no longer recognizes apedestrian as a person due to special cloth-ing or other objects
-a pedestrian is concealed by other objects
-the typical outline of a pedestrian is notdistinguishable from the background
Following damage to the front end of the vehicle,have the configuration and operation of theradar sensors checked at a qualified specialistworkshop. This also applies to collisions at slow
Driving safety systems73
Safety
Z