Page 23 of 217

Keys, doors and windows21
FaultIf the central locking system cannot
be operated with the radio remote
control, it may be due to the following:
■ 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
Unlocking 3 22.
Basic settings Some settings can be changed in the menu Settings in the Info-Display.
Vehicle personalisation 3 99.
Radio remote control battery
replacement Replace the battery as soon as the
range reduces.
Batteries do not belong in household
waste. They must be disposed of at
an appropriate recycling collection
point.
Key with foldaway key section
Extend the key and open the unit.
Replace the battery (battery type CR 2032), paying attention to the
installation position. Close the unit
and synchronise.
Radio remote controlsynchronisation
After replacing the battery, unlock the
door with the key in the driver's door
lock. The radio remote control is
synchronised when the ignition is
switched on.
Memorised settings Whenever the key is removed from
the ignition switch, the following
settings are automatically memorised by the key:
■ Lighting
■ Infotainment system
■ Central locking system
The saved settings are automatically
used the next time the memorised key
is inserted into the ignition switch and
turned to position 1 3 122.
Page 98 of 217

96Instruments and controls
■ Drive systems
■ Ride control systems
■ Cruise control
■ Object detection systems
■ Lighting, bulb replacement
■ Wiper/washer system
■ Doors, windows
■ Seat belts
■ Airbag systems
■ Engine and transmission
■ Tyre pressure
■ Battery
Warning chimes
When starting the engine or
whilst driving ■ If the door or bonnet is open.
■ If seat belt is not fastened.
■ If a certain speed is exceeded with parking brake applied.■ If a warning message or a warningcode appears in the Driver
Information Centre.
■ If the parking assist detects an object.
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.
Battery voltage When the battery voltage is running
low, a warning message or warning
code 174 will appear in the Driver
Information Centre.
1. Switch off immediately any electrical consumers which are
not required for a safe ride, e.g.
seat heating, heated rear window or other main consumers.
2. Charge the battery by driving continuously for a while or by
using a charging device.The warning message or warning
code will disappear after the engine has been started twice consecutively
without a voltage drop.
If the battery cannot be recharged,
have the cause of the fault remedied
by a workshop.
Page 162 of 217
160Vehicle care
Warning label
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
Lift the wiper arm, press button to
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.
Page 169 of 217

Vehicle care167Interior lightsCourtesy lights 1. To remove it, prise the opposite side of the light switch using a flat-blade screwdriver.
2. Remove the bulb.
3. Replace the bulb.
4. Reinstall the light assembly.
Load compartment light
1. Prise the light out with a screwdriver.
2. Remove bulb.
3. Insert new bulb.
4. Install light.Electrical system
Fuses
Data on the replacement fuse must
match the data on the defective fuse.
In a box above the positive terminal of the battery are some main fuses. If
necessary have them changed by a
workshop.
Before replacing a fuse, turn off the
respective switch and the ignition.
A blown fuse can be recognised by its
melted wire. Do not replace the fuse
until the cause of the fault has been
remedied.
Some functions are protected by
several fuses.
Fuses may also be inserted without
existence of a function.
Note
Not all fuse box descriptions in this
manual may apply to your vehicle.
When inspecting the fuse box, refer
to the fuse box label.
Page 212 of 217

210IndexAAccessories and vehicle modifications .......................... 153
Adaptive forward lighting .....88, 108
Adjustable air vents ...................119
Airbag and belt tensioners ...........84
Airbag deactivation ................47, 84
Airbag system .............................. 42
Air conditioning regular operation ................................ 120
Air conditioning system .............. 116
Air intake .................................... 120
Air vents...................................... 119
All-wheel drive ........................... 131
Antilock brake system ................ 132
Antilock brake system (ABS) .......86
Anti-theft alarm system ................26
Anti-theft locking system .............. 25
Appearance care ........................190
Automatic anti-dazzle ..................29
Automatic light control ...............105
Automatic locking ........................24
Automatic transmission .............128
Auxiliary heater ........................... 119
B Battery discharge protection ......114
Battery voltage ............................. 96
Bicycle rack .................................. 58Bonnet ....................................... 155
Bonnet open ................................. 89
Brake and clutch fluid .................194
Brake and clutch system .............85
Brake assist ............................... 133
Brake fluid .................................. 158
Brakes ............................... 132, 158
Breakdown.................................. 187
Bulb replacement ....................... 161
C
Capacities .................................. 205
Catalytic converter .....................127
Central locking system ................22
Centre console storage ...............57
Centre high-mounted brake light 166
Changing tyre and wheel size ...177
Charging system .......................... 85
Child locks ................................... 24
Child restraint installation locations ................................... 50
Child restraints.............................. 48
Child restraint systems ................48
Climate control ............................. 16
Climate control systems .............115
Clock ............................................ 77
Code ............................................. 94
Control indicators.......................... 82
Control of the vehicle .................121
Controls ........................................ 73