Keys, doors and windows21
Radio remote control
synchronisation 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
■ Range exceeded
■ Battery voltage 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 22.Electronic key system
Enables a keyless operation of the
following functions:
■ Central locking system 3 22
■ Tailgate 3 28
■ Ignition switching on and starting the engine 3 154
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 20.
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 3 119.
Battery replacement, see radio
remote control 3 20.
Electronic key synchronisation The electronic key synchronises itselfautomatically during every starting
procedure.
120Instruments and controls
■ 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
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 with parking brake applied.■ If adaptive cruise controldeactivates 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.
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.
314IndexAAccessories and vehicle modifications .......................... 215
Active Emergency Braking .........187
Active head restraints ...................45
Adaptive cruise control .......109, 175
Adaptive forward lighting ...109, 128
Adjustable air vents ...................148
Airbag and belt tensioners .........104
Airbag deactivation ..............62, 104
Airbag label................................... 57 Airbag system .............................. 57
Air conditioning regular operation ................................ 150
Air conditioning system .............. 137
Air intake .................................... 149
Air vents...................................... 148
All-wheel drive ........................... 165
Antilock brake system ................ 165
Antilock brake system (ABS) .....106
Anti-theft alarm system ................33
Anti-theft locking system .............. 32
Appearance care ........................260
Armrest ................................... 52, 53
Armrest storage ........................... 71
Ashtrays ....................................... 92
Automatic anti-dazzle ..................38
Automatic climate control system .................................... 139Automatic dimming ......................37
Automatic light control ...............126
Automatic locking ........................26
Automatic transmission .............160
Automatic transmission fluid .......219
Autostop ..................................... 108
Auxiliary heater ........................... 148
B Battery discharge protection ......135
Battery voltage ........................... 121
Belts.............................................. 53
Bonnet ....................................... 217
Brake and clutch fluid .................265
Brake and clutch system ...........105
Brake assist ............................... 167
Brake fluid .................................. 221
Brakes ............................... 165, 221
Breakdown.................................. 257
Bulb replacement ....................... 225
C
Capacities .................................. 285
Cargo management system ........76
Car Pass ...................................... 20
Catalytic converter .....................160
Central locking system ................22
Centre console lighting ..............134
Changing tyre and wheel size ...246
Charging system ........................ 104
318
Transmission ............................... 16
Transmission display .................160
Tread depth ............................... 245
Trip odometer .............................. 99
Turn and lane-change signals ...131
Turn signal ................................. 103
Tyre chains ................................ 247
Tyre designations ......................242
Tyre pressure ............................ 242
Tyre pressure monitoring system ............................ 107, 243
Tyre pressures ........................... 286
Tyre repair kit ............................. 247
U Ultrasonic parking assist ...106, 189
Upholstery .................................. 262
Upshift ........................................ 106
Using this manual ..........................3
V Valet mode ................................. 117
Variable effort steering ...............106
Vehicle battery ........................... 221
Vehicle checks............................ 216
Vehicle data ................................ 269
Vehicle data recording and privacy ..................................... 311
Vehicle detected ahead ..............109
Vehicle dimensions .................... 284Vehicle Identification Number ....267
Vehicle jack ................................ 241
Vehicle messages .....................119
Vehicle personalisation .............121
Vehicle security ............................ 32
Vehicle specific data ......................3
Vehicle storage ........................... 215
Vehicle tools ............................... 241
Vehicle unlocking ........................... 6
Vehicle weight ........................... 278
Ventilating ..................................... 53
Ventilation ................................... 137
W
Warning chimes .........................120
Warning lights ............................... 99
Warning triangle .......................... 81
Washer and wiper systems .........13
Washer fluid ............................... 221
Wheel changing .........................250
Wheel covers ............................. 246
Wheels and tyres .......................242
Windows ....................................... 38
Windscreen................................... 38
Windscreen wiper/washer ...........87
Winter tyres ............................... 242
Wiper blade replacement ..........224
X Xenon headlights .......................228