22Keys, doors and windows
FaultIf 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 frequentintervals, 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 29
■ Ignition switching on and starting the engine 3 151
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.
Note
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 3 116.
Battery replacement, see radio
remote control 3 21.
Electronic key synchronisation The electronic key synchronises itselfautomatically during every starting
procedure.
Instruments and controls117
■ Ride control systems
■ 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.
Vehicle care221
Meaning of symbols:■ No sparks, naked flames or smoking.
■ Always shield eyes. Explosive gases can cause blindness or
injury.
■ Keep the vehicle battery out of reach of children.
■ The vehicle battery contains sulphuric acid which could cause
blindness or serious burn injuries.
■ See the Owner’s Manual for further
information.
■ Explosive gas may be present in the vicinity of the vehicle battery.Diesel fuel system
bleeding
If the tank has been run dry, the diesel fuel system must be bled. Switch on
the ignition three times for
15 seconds at a time. Then crank the
engine for a maximum of
40 seconds. Repeat this process after
no less than 5 seconds. If the engine
fails to start, seek the assistance of a
workshop.
Wiper blade replacement Wiper blades on the windscreenLift the wiper arm and open the
retaining clip.
Disengage the wiper blade and
remove.
Attach the wiper blade slightly angled
to the wiper arm and push until it
engages.
Lower wiper arm carefully.
314IndexAAccessories and vehicle modifications .......................... 213
Active Emergency Braking .........185
Active head restraints ...................46
Adaptive cruise control .......106, 173
Adaptive forward lighting ...106, 125
Adjustable air vents ...................145
Airbag and belt tensioners .........101
Airbag deactivation ..............60, 101
Airbag system .............................. 58
Air conditioning regular operation ................................ 147
Air conditioning system .............. 134
Air intake .................................... 146
Air vents...................................... 145
All-wheel drive ........................... 163
Antilock brake system ................ 163
Antilock brake system (ABS) .....103
Anti-theft alarm system ................34
Anti-theft locking system .............. 33
Appearance care ........................257
Apply footbrake .......................... 105
Armrest ................................... 53, 54
Armrest storage ........................... 68
Ashtrays ....................................... 90 Automatic anti-dazzle ..................39
Automatic climate control system .................................... 136Automatic dimming ......................38
Automatic light control ...............123
Automatic locking ........................27
Automatic transmission .............157
Autostop ..................................... 105
Auxiliary heater ........................... 145
B Battery discharge protection ......132
Battery voltage ........................... 118
Belts.............................................. 54
Bonnet ....................................... 215
Brake and clutch fluid .................262
Brake and clutch system ...........102
Brake assist ............................... 165
Brake fluid .................................. 218
Brakes ............................... 163, 218
Breakdown.................................. 254
Bulb replacement ....................... 222
C Capacities .................................. 288
Cargo management system ........73
Car Pass ...................................... 20
Catalytic converter .....................157
Central locking system ................23
Centre console lighting ..............131
Changing tyre and wheel size ...243
Charging system ........................ 101
Child locks ................................... 28
318
Tread depth ............................... 243
Trip odometer .............................. 96
Turn and lane-change signals ...128
Turn signal ................................. 100
Tyre chains ................................ 244
Tyre designations ......................240
Tyre pressure ............................ 240
Tyre pressure monitoring system ............................. 104, 241
Tyre pressures ........................... 289
Tyre repair kit ............................. 244
U Ultrasonic parking assist ...103, 187
Upholstery .................................. 259
Upshift ........................................ 103
Using this manual ..........................3
V
Valet mode ................................. 114
Variable effort steering ...............103
Vehicle battery ........................... 219
Vehicle checks............................ 214
Vehicle data ................................ 266
Vehicle data recording and privacy ..................................... 312
Vehicle detected ahead ..............106
Vehicle dimensions .................... 286
Vehicle Identification Number ....264
Vehicle jack ................................ 239Vehicle messages .....................116
Vehicle personalisation .............118
Vehicle security ............................ 33
Vehicle specific data ......................3
Vehicle storage ........................... 213
Vehicle tools ............................... 239
Vehicle unlocking ........................... 6
Vehicle weight ........................... 275
Ventilating ..................................... 54
Ventilation ................................... 134
W
Warning chimes .........................117
Warning lights ............................... 96
Warning triangle .......................... 78
Washer and wiper systems .........14
Washer fluid ............................... 218
Wheel changing .........................247
Wheel covers ............................. 244
Wheels and tyres .......................240
Windows ....................................... 39
Windscreen................................... 39
Windscreen wiper/washer ...........84
Winter tyres ............................... 240
Wiper blade replacement ..........221
X Xenon headlights .......................225