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32Keys, doors and windowsvehicle, or if the auxiliary heater
3 109 is set for a timed or remote
controlled start.
Depending on vehicle configuration:
● press and hold e, or
● switch ignition on and off twice quickly, then close doors and
activate the anti-theft alarm
system
An audible signal will sound as
confirmation.
The status will remain until the doors
are unlocked.
Alarm
When triggered, the alarm sounds via a separate battery-backed power
sounder, and the hazard warning
lights flash simultaneously. The
number and duration of alarm signals
are stipulated by legislation.
If the vehicle battery is disconnected
or its power supply is interrupted, the
alarm siren will be triggered. First
deactivate the anti-theft alarm system if the vehicle battery must be
disconnected.
To silence the alarm siren (if
triggered) and therefore deactivate
the anti-theft alarm system, reconnect vehicle battery and unlock vehicle
with remote control button c (or
switch on the ignition).
Immobiliser
The system is part of the ignition
switch and checks whether the
vehicle is allowed to be started with
the key being used.The immobiliser is activated
automatically after the key has been
removed from the ignition switch and
also if the key is left in the ignition
switch when the engine is turned off.
If the engine cannot be started, switch off the ignition and remove key, wait
approx. 2 seconds and then repeat
the start attempt.If start attempt is
unsuccessful, attempt to start the
engine using the spare key and seek
the assistance of a workshop.
Notice
The immobiliser does not lock the doors. You should always lock the
vehicle after leaving it and switch on the anti-theft alarm system 3 21,
3 31.
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Climate control109Additional air conditioning is supplied
to the rear passenger compartment
via the overhead air vents.
Fan speed
Adjust the air flow to select the
desired speed.
turn clockwise:increase air flowturn anti-clock‐
wise:decrease air flow
Combi
Additional air conditioning is supplied
to the rear passenger compartment
via the air vents located above the
driver and front passenger
compartment.
With the front passenger
compartment air conditioning system
switched on, adjust the air flow to
select the desired speed.
Ensure the air vents are open when in use, to prevent ice forming in the
system due to lack of air movement.
Auxiliary heater
Coolant heater The Eberspächer engine-
independent, fuel-powered coolant
heater provides rapid heating of the
engine coolant to enable heating of
the vehicle interior without the engine
running.9 Warning
Do not operate the system when
refuelling, when dust or
combustible vapours are present
or in enclosed spaces (e.g.
garage).
Before starting or programming the
system to start, turn the vehicle's
climate control system to heat and the
air distribution to V.
Switch off when not required. Heating stops automatically after the
programmed runtime. It will also
cease to operate if the vehicle fuel
level drops too low.
During operation, power from the
vehicle battery is used. The driving
time should therefore be at least as
long as the heating time. For short
journey times, check the vehicle
battery regularly and recharge if
necessary.
To ensure efficient performance,
briefly operate the auxiliary heater
once a month.
Control units The timer or remote control unit turns
the system on and off, and is used to programme specific departure times.
Page 163 of 233

Vehicle care161● See the Owner's Manual forfurther information.
● Explosive gas may be present in the vicinity of the battery.
Additional battery
Depending on the vehicle's auxiliary
equipment, certain models may have
an additional battery mounted under
the front seat.
Diesel fuel filter
Drain diesel fuel filter of residual
water at every engine oil change.
Place a container underneath the
filter housing. Loosen the knurled
screws on the filter cover and on the
lower part of the filter by approx. one
turn, to drain off the water.
The filter is drained as soon as diesel fuel emerges from the knurled screw
at the bottom. Retighten the two
screws.
Check diesel fuel filter at shorter
intervals if the vehicle is subjected to
extreme operating conditions.
Diesel fuel system bleedingIf the fuel tank has been run dry, it will be necessary to air vent or bleed the
diesel fuel system.
Fill the tank with fuel and proceed as
follows:
1. Place a suitable container underneath the fuel filter vent
screw to collect fuel.
2. Loosen the vent screw (arrowed) by one turn.
3. Manually operate the in-line supply pump slowly and steadily
until fuel discharging from the
loosened vent screw is free of air
bubbles.
4. Retighten the vent screw.
If the engine cannot be started after
several attempts to bleed the diesel
fuel system, seek the assistance of a
workshop.
Page 226 of 233

224IndexAAccessories and vehicle modifications .......................... 154
Adaptive forward lighting .....98, 164
AdBlue .......................... 87, 125, 196
Adblue gauge ............................... 79
AdBlue tank ................................ 218
Adjustable air vents ...................113
Airbag and belt tensioners ...........84
Airbag deactivation ................53, 84
Airbag label................................... 49 Airbag system .............................. 49
Air conditioning regular operation ................................ 114
Air conditioning system .............. 104
Air intake .................................... 114
Air suspension ........................... 122
Air suspension system................ 190
Air vents...................................... 113
Antifreeze ................................... 157
Antilock brake system ................ 134
Antilock brake system (ABS) .......86
Anti-theft alarm system ................31
Anti-theft bolts............................. 184
Anti-theft locking system .............. 30
Anti-theft security lock ..................21
Appearance care ........................192
Armrest ........................................ 44
Ashtrays ....................................... 77
Automatic light control .................95Automatic locking ...................21, 25
Autostop ..................................... 118
Auxiliary heater ........................... 109
B Battery discharge protection ......102
Battery, jump starting.................. 188
Belts.............................................. 46 BlueInjection ............................... 125
Bonnet ....................................... 155
Brake assist ............................... 136
Brake fluid .......................... 159, 196
Brakes ............................... 134, 159
Brake system ............................... 85
Breakdown.................................. 190
Bulb replacement ....................... 162
C Capacities .................................. 218
Cargo management system ........67
Car Pass ...................................... 19
Catalytic converter .....................124
Central locking system ................21
Centre high-mounted brake light 167
Changing tyre and wheel size ...179
Charging system .......................... 84
Child locks ................................... 25
Child restraint installation locations ................................... 56
Child restraints.............................. 55
Child restraint systems ................55