Automatic transmission emer-
gency running mode
.........................175
Auxiliary heating
Setting .......................................... .295
Auxiliary heating/ventilation
Display message ............................ 335
Important safety notes .................. 149
Problem (display message) ............ 154
Remote control .............................. 151
Setting the departure time ............. 152
Switching on/off (on the centre
console) ......................................... 150
Axle load, permissible (trailer tow-
ing) ...................................................... 447 B
Bag hook ............................................ 356
Ball coupling
Swinging in ................................... .276
Swinging out .................................. 274
BAS (Brake Assist System) ................. 71
BAS PLUS with Cross-Traffic Assist (Brake Assist PLUS with Cross-
Traffic Assist)
Function/notes ................................ 71
Important safety notes .................... 72
Battery (high-voltage)
see High-voltage battery
Battery (key)
Checking .......................................... 87
Important safety notes .................... 87
Replacing ......................................... 87
Battery (vehicle)
Charging ........................................ 395
Display message ............................ 317
Important safety notes .................. 392
Jump starting ................................. 397
Overview ........................................ 392
Belt
see Seat belts
Belt tensioner
Activation ......................................... 55
Blind Spot Assist
Activating/deactivating ................. 291
Display message ............................ 326
Notes/function .............................. 244
Trailer towing ................................. 246 see Active Blind Spot Assist
BlueTEC
Topping up AdBlue ®
....................... 180
BlueTEC (AdBlue ®
) ............................ .439
Bonnet
Active bonnet (pedestrian protec-tion) ............................................... 373
Closing .......................................... .374
Display message ............................ 334
Important safety notes .................. 373
Opening ......................................... 374
Boot
see Tailgate
Brake Assist
see BAS (Brake Assist System)
Brake fluid
Display message ............................ 306
Notes ............................................. 441
Brake force distribution
see EBD (electronic brake force
distribution)
Brake lamps
Adaptive .......................................... .75
Display message ............................ 314
Brake pedal
Pedal resistance/pedal travel .......... 43
Brakes
ABS .................................................. 70
Adaptive Brake Assist ...................... 74
BAS .................................................. 71
BAS PLUS with Cross-Traffic
Assist ............................................... 71
Brake fluid (notes) ........................ .441
Display message ............................ 301
Driving tips ................................... .196
High-performance brake system .... 197
Important safety notes .................. 196
Parking brake ................................ 192
RBS warning lamp .......................... 340
Recuperative Brake System ............. 43
Warning lamp ................................. 339
Breakdown
Where will I find...? ........................ 386
see Flat tyre
see Towing away
Brightness control (instrument
cluster lighting) ................................... 32 Index
5
Display messages
Possible causes/consequences and
M
MSolutions !
Parking brake inop‐ Parking brake inop‐
erative erative The yellow
!warning lamp lights up. The red !indicator lamp
flashes for about ten seconds after the electric parking brake has been applied or released. It then goes out or remains lit.
The electric parking brake is malfunctioning, e.g. because of over-
voltage or undervoltage.
X Rectify the cause of the overvoltage or undervoltage, e.g. by charg-
ing the battery or restarting the engine.
X Apply or release the electric parking brake.
If the electric parking brake still cannot be applied or released: X Switch off the ignition and turn it back on.
X Apply or release the electric parking brake.
If the electric parking brake still cannot be released: X Consult a qualified specialist workshop.
If it is still not possible to apply the electric parking brake:
X Consult a qualified specialist workshop. The yellow
!warning lamp lights up and the red !indicator
lamp flashes.
It is not possible to apply the electric parking brake manually.
X Shift the transmission to position P.
X Consult a qualified specialist workshop. J
Check brake fluid Check brake fluid
level level There is insufficient brake fluid in the brake fluid reservoir. In addition,
the J warning lamp in the instrument cluster lights up and a warn-
ing tone sounds.
G WARNING
Braking efficiency may be impaired.
There is a risk of an accident.
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions. Do not continue driving
under any circumstances.
X Safeguard the vehicle against rolling away (Y page 191).
X Consult a qualified specialist workshop.
X Do not top up the brake fluid. This does not correct the fault. #
Check Check
brake
brakepad
padwear
wear The brake pads/linings have reached their wear limit.
X Consult a qualified specialist workshop. G
Inoperative
Inoperative One or more main features of the Mercedes-Benz Contact system are
malfunctioning.
X Consult a qualified specialist workshop. 306
Display
messagesOn-board computer and displays
