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244Vehicle care
2. Unscrew the plastic securing nutby hand.
3. Carefully withdraw light assemblyfrom recess and remove. Take
care that the cable is not being
pulled off.
4. Turn the bulb socket anticlockwise and remove it from
the light assembly.
Rear fog light ( 1)
Reverse light ( 2)
5. Detach the bulb from the bulb socket and replace the bulb.
Rear fog light
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Vehicle care245Reverse light
6. Insert the bulb socket into the tail light assembly. Fit light assembly
on the tailgate and tighten the
screw from the inside. Attach
cover.
Sports Tourer, Country Tourer
Light assembly in the body
1. Open the covers with screwdriver.
Unscrew and remove both
screws.
2. Carefully withdraw light assembly from recess and remove. Take
care that the cable is not being
pulled off.
3. Turn the turn light bulb socket anticlockwise and remove it from
the light assembly.
4. Detach the bulb from the bulb socket and replace the turn light
bulb.
5. Attach the bulb socket to the light assembly.
6. Attach the light assembly to the vehicle body and tighten the
screws. Close covers.
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246Vehicle careLight assembly in the tailgate
1. Release the cover in the tailgateand remove it.
2. Unscrew the plastic securing nutby hand.
3. Carefully withdraw the lightassembly from the recess and
remove. Take care that the cable
is not being pulled off.
4. Turn the bulb socket anticlockwise and remove it from
the light assembly.
Rear fog light ( 1)
Reverse light ( 2)
5. Detach the bulb from the bulb socket and replace the bulb.
Rear fog light
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Vehicle care247
Reverse light
6. Insert the bulb socket into the light
assembly. Fit light assembly on
the tailgate and tighten the screw
from the inside. Attach cover.
Side turn lights
To replace bulb, remove lamp
housing:
1. Slide the lamp housing forward and remove it at the back.
2. Turn bulb holder anticlockwiseand remove from housing.
3. Pull bulb from bulb holder and replace it.
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248Vehicle care4. Insert bulb holder and turnclockwise.
5. Insert left end of the lamp, slide to
the left and insert right end.
Number plate light
The number plate light is designed as
LEDs and can not be changed. In
case of defective LEDs, have them
replaced by a workshop.
Interior lights
Have the following bulbs replaced by
a workshop:
● courtesy light, reading lights
● load compartment light
● instrument panel illuminationElectrical system
Fuses Data on the replacement fuse mustmatch the data on the defective fuse.
There are two fuse boxes in the
vehicle:
● engine compartment
● instrument panel
Before replacing a fuse, turn off the
respective switch and the ignition.
A blown fuse can be recognised by its melted wire.Caution
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.
Fuse extractor
A fuse extractor may be located in the
fuse box in the engine compartment.
The extractor has two sides, each
side is designed for a different type of fuses.
Page 252 of 315
250Vehicle careNo.Circuit1–2–3ABS4–5–6Tailgate7Rear fog light / Front fog lights8Memory module9Heated windscreen10Seat lumbar11DC / DC battery12Heated rear window13Heated mirror14–15–16Front wiper17Power seat, passengerNo.Circuit18Sunblind19Power seat, driver20–21Sunroof22Rear wiper / Airbag23Adaptive forward lighting24–25–26Transmission control module27Ignition / Instrument panel28–29Rear view camera / Air vent30Malfunction indicator light /
Trailer31–32Camera33Seat heat front34Seat heat rearNo.Circuit35Damping / All-wheel drive36Fuel system37–38–39–40Steering wheel lock41–42–43Heated steering wheel44Headlight range adjustment45–46Engine control module47–48DC/DC converter / Air vent / E-
Boost49Rear door control module50–51–
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Vehicle care253No.Circuit18Body control module19AdBlue module20Body control module21Body control module22Body control module23Electric steering wheel lock24Airbag25Diagnostic connector26Power outlet load compartment27EBCM valve28Police provision29–30–31Steering wheel controls32Ignition switch33Climate control34Central gateway moduleNo.Circuit35AUX / USB connector36Wireless charger37Rear wiper38Emergency call39Display40Parking assist41Overhead console42Infotainment SystemVehicle tools
Tools
Vehicles with spare wheel
The jack with wheel wrench, the tools,
an extension bolt for securing a
damaged wheel and the towing eye
are placed in the tool box below the
spare wheel in the load compartment.
Spare wheel 3 265.
Page 261 of 315

Vehicle care259For safety reasons, it is
recommended that the tread depth of
the tyres on one axle should not vary
by more than 2 mm.
The legally permissible minimum
tread depth (1.6 mm) has been
reached when the tread has worn
down as far as one of the tread wear
indicators (TWI). Their position is
indicated by markings on the
sidewall.
If there is more wear at the front than
the rear, swap round front wheels and rear wheels periodically. Ensure that
the direction of rotation of the wheels
remains the same.
Tyres age, even if they are not used.
We recommend tyre replacement
every 6 years.
Changing tyre and wheel
size
If tyres of a different size than those
fitted at the factory are used, it may be necessary to reprogramme 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 3 256.9 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 steel wheels: When
using locking wheel nuts, do not
attach wheel covers.