22Keys, doors and windows
Radio remote controlsynchronisation
After replacing the battery, unlock the
door with the key in the driver's door
lock. The radio remote control will be
synchronised when you switch on the
ignition.
Fault
If the central locking system cannot
be operated with the radio remote
control, the cause may be one of the
following:
■ Fault in radio remote control.
■ The range is exceeded.
■ The battery voltage is too low.
■ Frequent, repeated operation of the
radio remote control while not in
range, which will require re-
synchronisation.
■ Overload of the central locking system by operating at frequent
intervals, the power supply is
interrupted for a short time.
■ Interference from higher-power radio waves from other sources.
Manual unlocking 3 23.Electronic key system
Enables a keyless operation of the
following functions:
■ central locking system 3 23
■ tailgate 3 28
■ ignition switching on and starting the engine 3 155
The electronic key simply needs to be on the driver's person.
Additionally, the electronic key
includes the functionality of the radio
remote control 3 21.
Handle with care, protect from
moisture and high temperatures and
avoid unnecessary operation.
Notice
Do not put the electronic key in the
load compartment or in front of the
Info-Display.
Replacing battery in electronic
key Replace the battery as soon as the
system no longer operates properly or the range is reduced. The need for
battery replacement is indicated by a
message in the Driver Information
Centre 3 120.
Battery replacement, see 'Radio
remote control' 3 21.
Electronic key synchronisation
The electronic key synchronises itself automatically during every starting
procedure.
Instruments and controls121
■ driver assistance systems
■ cruise control
■ speed limiter
■ adaptive cruise control
■ forward collision alert
■ collision imminent braking system
■ parking assist systems
■ lighting, bulb replacement
■ adaptive forward lighting
■ wiper/washer system
■ doors, windows
■ side blind spot alert
■ traffic sign assistant
■ lane departure warning
■ load compartment, boot lid
■ radio remote control
■ electronic key system
■ keyless starting
■ seat belts
■ airbag systems
■ engine and transmission
■ tyre pressure
■ diesel particle filter■ vehicle battery status
■ selective catalytic reduction, diesel exhaust fluid (DEF), AdBlue
3 161
Messages in the
Colour-Info-Display
Some important messages may
appear additionally in the
Colour-Info-Display. Press the
multifunction knob to confirm a
message. Some messages only pop- up for a few seconds.
Warning chimes When starting the engine or
whilst driving
Only one warning chime will sound at a time.
The warning chime regarding not
fastened seat belts has priority over
any other warning chime.
■ If seat belt is not fastened.
■ If a door or the tailgate is not fully closed when starting off.■ If a certain speed is exceeded withparking brake applied.
■ If adaptive cruise control deactivates automatically.
■ If approaching a vehicle ahead too closely.
■ If a programmed speed or speed limit is exceeded.
■ If a warning message appears in the Driver Information Centre.
■ If the electronic key is not in the passenger compartment.
■ If the parking assist detects an object.
■ If an unintended lane change occurs.
■ If the diesel particle filter has reached the maximum filling level.
■ If AdBlue needs to be refilled.
When the vehicle is parked and/ or the driver's door is opened ■ When the key is in the ignition switch.
■ With exterior lights on.
■ If the trailer hitch is not engaged.
324IndexAAccessories and vehicle modifications .......................... 222
Active Emergency Braking .........191
Active head restraints ...................46
Adaptive cruise control .......110, 180
Adaptive forward lighting ...110, 129
AdBlue ................................ 108, 161
Adjustable air vents ...................149
Airbag and belt tensioners .........105
Airbag deactivation ..............63, 105
Airbag label................................... 58 Airbag system .............................. 58
Air conditioning regular operation ................................ 151
Air conditioning system .............. 138
Air intake .................................... 150
Air vents...................................... 149
All-wheel drive ........................... 169
Antilock brake system ................ 169
Antilock brake system (ABS) .....107
Anti-theft alarm system ................33
Anti-theft locking system .............. 33
Appearance care ........................267
Armrest ................................... 53, 54
Armrest storage ........................... 72
Ashtrays ....................................... 93
Automatic anti-dazzle ..................39Automatic climate control
system .................................... 140
Automatic dimming ......................38
Automatic light control ...............127
Automatic locking ........................27
Automatic transmission .............164
Automatic transmission fluid .......226
Autostop ..................................... 110
Auxiliary heater ........................... 149
B Battery discharge protection ......136
Battery voltage ........................... 122
Belts.............................................. 54 BlueInjection ............................... 161
Bonnet ....................................... 224
Brake and clutch fluid .................272
Brake and clutch system ...........106
Brake assist ............................... 172
Brake fluid .................................. 228 Brakes ............................... 169, 228
Breakdown.................................. 264
Bulb replacement ....................... 232
C Capacities .................................. 292
Cargo management system ........77
Car Pass ...................................... 21
Catalytic converter .....................161
Central locking system ................23
328
Towing equipment .....................219
Towing the vehicle .....................264
Traction Control system ............. 172
Traction Control system off......... 108
Traffic sign assistant ...........111, 205
Trailer coupling ........................... 218
Trailer stability assist .................221
Trailer towing ............................. 219
Transmission ............................... 16
Transmission display .................164
Tread depth ............................... 252
Trip odometer ............................ 100
Turn and lane-change signals ...132
Turn signal ................................. 104
Tyre chains ................................ 254
Tyre designations ......................249
Tyre pressure ............................ 250
Tyre pressure monitoring system ............................ 109, 251
Tyre pressures ........................... 293
Tyre repair kit ............................. 254
U Ultrasonic parking assist ...107, 193
Upholstery .................................. 269
Upshift ........................................ 107
Using this manual ..........................3V
Valet mode ................................. 118
Variable effort steering ...............107
Vehicle battery ........................... 228
Vehicle checks............................ 223
Vehicle data ................................ 276
Vehicle data recording and privacy ..................................... 322
Vehicle detected ahead ..............110
Vehicle dimensions .................... 291
Vehicle Identification Number ....274
Vehicle jack ................................ 248
Vehicle messages .....................120
Vehicle personalisation .............122
Vehicle security ............................ 33
Vehicle specific data ......................3
Vehicle storage ........................... 222
Vehicle tools ............................... 248
Vehicle unlocking ........................... 6
Vehicle weight ........................... 285
Ventilating ..................................... 53
Ventilation ................................... 138
W
Warning chimes .........................121
Warning lights ............................. 100
Warning triangle .......................... 82
Washer and wiper systems .........13
Washer fluid ............................... 228Wheel changing .........................257
Wheel covers ............................. 253
Wheels and tyres .......................249
Windows ....................................... 39
Windscreen................................... 39 Windscreen wiper/washer ...........88
Winter tyres ............................... 249
Wiper blade replacement ..........231
X Xenon headlights .......................235