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Vehicle care179Vehicle checks
Performing work9 Warning
Only perform engine compartment
checks when the ignition is off.
The cooling fan may start
operating even if the ignition is off.
9 Danger
The ignition system and Xenon
headlights use extremely high
voltage. Do not touch.
Bonnet
Opening
Pull the release lever and return it to
its original position.
Move the safety catch sideways to the left vehicle side and open the bonnet.
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Vehicle care181The engine oil filler cap is located on
the camshaft cover.Caution
Overfilled engine oil must be
drained or suctioned out.
Capacities 3 231.
Fit the cap on straight and tighten it.
Engine coolant The coolant provides freeze
protection down to approx. -30 °C. In
northern countries with very low
temperatures the factory filled coolant
provides frost protection down to
approx. -40 °C.
Caution
Only use approved antifreeze.
Coolant and antifreeze 3 218.
Coolant levelCaution
Too low a coolant level can cause
engine damage.
If the cooling system is cold, the
coolant level should be above the
filling line mark. Top up if the level is
low.
9 Warning
Allow the engine to cool before
opening the cap. Carefully open
the cap, relieving the pressure
slowly.
To top up use a 1:1 mixture of
released coolant concentrate mixed
with clean tap water. If no coolant
concentrate is available, use clean
tap water. Install the cap tightly. Have
the coolant concentration checked
and have the cause of the coolant
loss remedied by a workshop.
Power steering fluid
Caution
Extremely small amounts of
contamination can cause steering
system damage and cause it to not work properly. Do not allow
contaminates to contact the fluid
side of the reservoir cap/dipstick or
from entering the reservoir.
Page 193 of 249
Vehicle care191No.Circuit1Sunroof2Exterior mirror switch/Rain
sensor/Power window DRV3–4–5Electrical brake control module6Intelligent battery sensor7Steering column lock8Transmission control module9–10Rear view camera/Interior rear
view mirror/Headlight switch/
Headlight11Rear window wiper12Heated rear window13Seat, lumbar support14Heated exterior mirrors15LPG module/Fuel system
control moduleNo.Circuit16Seat heating17Transmission control module R/ C/Water pump/Auxiliary heater18Engine control module R/C19Fuel pump20–21Cooling fan22–23Ignition coil/Injectors24Washer pump25Headlamp actuator26Engine control sensors27–28Ignition29Ignition 1/230Exhaust system31Left-hand high beam32Right-hand high beamNo.Circuit33Engine control module34Horn35Air conditioning system36Front fog lamp
J-cases Fuses
No.Circuit1Electrical brake control module2Front wiper3Power module4Power terminal of instrument
panel fuse box5–6Fuel heater7Starter8Cooling fan9Cooling fan
Page 204 of 249

202Vehicle careChanging tyre and wheel
size
If tyres of a different size than thosefitted at the factory are used, it may be necessary to reprogramme the
speedometer as well as the nominal
tyre pressure and make other vehicle modifications.
After converting to a different tyre
size, have the label with tyre
pressures replaced and the tyre
pressure monitoring system
reinitialised. 3 1979 Warning
The use of unsuitable tyres or
wheels may lead to accidents and will invalidate the vehicle
operating permit.
Wheel covers
Wheel covers and tyres that are
factory-approved for the respective
vehicle and comply with all of the
relevant wheel and tyre combination requirements must be used.
If the wheel covers and tyres used are
not factory-approved, the tyres must
not have a rim protection ridge.
Wheel covers must not impair brake
cooling.9 Warning
Use of unsuitable tyres or wheel
covers could lead to sudden
pressure loss and thereby
accidents.
Vehicles with alloy wheels: When
mounting steel wheels with alloy
wheel nuts, e.g. when changing to
winter tyres, the wheel covers cannot
be attached to the steel wheels.
Tyre chains
Use tyre chains only on front wheels.
9 Warning
Damage may lead to tyre blowout.
Tyre chains are permitted on tyres of
size 215/65 R16, 215/60 R17 and
215/55 R18.
On tyres of size 215/65 R16 and
215/60 R17 always use fine mesh
chains suitable for sport utility
vehicles that add no more than
9 mm to the tyre tread and the inboard sides (including chain lock).