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190Driving and operatingTrailer hitch
General information
Only use towing equipment that has
been approved for your vehicle.
Entrust retrofitting of towing
equipment to a workshop. It may be
necessary to make changes that
affect the cooling system, heat
shields or other equipment.
The bulb outage detection function for trailer brake light cannot detect a
partial bulb outage, e.g. in case of four
times five watt bulbs, the function only detects lamp outage when only a
single five Watt lamp remains or none
remain.
Fitting of towing equipment could
cover the opening of the towing eye.
If this is the case use the coupling ball bar for towing. Always keep the
coupling ball bar in the vehicle when
not in use.Driving characteristics and
towing tips
Before attaching a trailer, lubricatethe coupling ball. However, do not do
so if a stabiliser, which acts on the
coupling ball, is being used to reduce snaking movements.
For trailers with low driving stability
and caravan trailers with a permitted
gross vehicle weight of more than
1300 kg the use of a stabiliser is
strongly recommended when driving
above 50 mph.
If the trailer starts snaking, drive more
slowly, do not attempt to correct the
steering and brake sharply if
necessary.
When driving downhill, drive in the
same gear as if driving uphill and
drive at a similar speed.
Adjust tyre pressure to the value
specified for full load 3 253.Trailer towing
Trailer loads
The permissible trailer loads are
vehicle and engine-dependent
maximum values which must not be
exceeded. The actual trailer load is
the difference between the actual
gross weight of the trailer and the
actual coupling socket load with the
trailer coupled.
The permissible trailer loads are
specified in the vehicle documents. In general, they are valid for gradients
up to max. 12%.
The permitted trailer load applies up to the specified incline and up to an
altitude of 1000 metres above sea
level. Since engine power decreases
as altitude increases due to the air becoming thinner, therefore reducing
climbing ability, the permissible gross
train weight also decreases by 10%
for every 1000 metres of additional
altitude. The gross train weight does
not have to be reduced when driving
on roads with slight inclines (less than 8%, e.g. motorways).
Page 196 of 267

194Vehicle careVehicle careGeneral Information...................194
Accessories and vehicle modifications .......................... 194
Vehicle storage ........................195
End-of-life vehicle recovery .....195
Vehicle checks ........................... 196
Performing work ......................196
Bonnet ..................................... 196
Engine oil ................................. 197
Engine coolant ......................... 198
Washer fluid ............................ 199
Brakes ..................................... 199
Brake fluid ............................... 199
Vehicle battery ......................... 200
Diesel fuel system bleeding .....201
Wiper blade replacement ........202
Bulb replacement .......................202
Halogen headlights ..................202
Fog lights ................................. 204
Tail lights ................................. 205
Side turn signal lights ..............208
Number plate light ...................209
Interior lights ............................ 210
Instrument panel illumination ...210Electrical system ........................210
Fuses ....................................... 210
Engine compartment fuse box . 211
Instrument panel fuse box .......213
Load compartment fuse box ....215
Vehicle tools .............................. 217
Tools ........................................ 217
Wheels and tyres .......................217
Winter tyres ............................. 217
Tyre designations ....................218
Tyre pressure .......................... 218
Tyre pressure monitoring system .................................... 219
Tread depth ............................. 223
Changing tyre and wheel size . 224 Wheel covers ........................... 224
Tyre chains .............................. 224
Tyre repair kit .......................... 224
Wheel changing .......................227
Spare wheel ............................ 230
Jump starting ............................. 232
Towing ....................................... 234
Towing the vehicle ...................234
Towing another vehicle ...........235
Appearance care .......................236
Exterior care ............................ 236
Interior care ............................. 237General Information
Accessories and vehiclemodifications
We recommend the use of genuine
parts and accessories and factory
approved parts specific for your
vehicle type. We cannot assess or guarantee reliability of other products
- even if they have a regulatory or
otherwise granted approval.
Do not make any modifications to the
electrical system, e.g. changes of
electronic control units (chip tuning).Caution
When transporting the vehicle on
a train or on a recovery vehicle, the
mud flaps might be damaged.
Page 204 of 267
202Vehicle careWiper blade replacement
Lift the wiper arm until it stays in the
raised position, 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.
Wiper blade on the rear window
Lift wiper arm. Disengage wiper blade as shown in illustration and remove.
Attach the wiper blade slightly angled
to the wiper arm and push until it
engages.
Lower wiper arm carefully.
Bulb replacement
Switch off the ignition and switch off
the relevant switch or close the doors.
Only hold a new bulb at the base. Do not touch the bulb glass with bare
hands.
Use only the same bulb type for
replacement.
Replace headlight bulbs from within
the engine compartment.
Bulb check
After a bulb replacement switch on
the ignition, operate and check the
lights.
Halogen headlights Halogen headlights with separate
bulbs for low beam and high beam.
Page 206 of 267
204Vehicle care
2. Disengage spring clip fromretainer by moving it forward and
to the side. Swivel spring clip
downwards.
3. Withdraw the bulb holder from the
reflector.4. Detach the bulb from the bulb holder and replace the bulb.
5. Insert the bulb holder and install spring clip.
Fit the cap and rotate clockwise.
Front turn signal light In case of defective LEDs, have them
replaced by a workshop.
Side light
In case of defective LEDs, have them replaced by a workshop.
Daytime running light
In case of defective LEDs, have them
replaced by a workshop.
Fog lights
The bulbs are accessible from the
underside of the vehicle.
1. Turn the bulb holder anti- clockwise and remove it from the
reflector.
Page 207 of 267
Vehicle care205
2. Disengage the bulb socket fromthe plug connector by pressing
the retaining lug.
3. Remove and replace the bulb socket with bulb and attach the
plug connector.
4. Insert the bulb socket into the reflector by turning clockwise and
engage.
Tail lights
1. Release the cover on the respective side and remove it.
2. Vehicles with tyre repair kit: To replace bulbs on the right side,
first unscrew the plastic nut and
take out the insert with the sealant
bottle.
3. Unscrew the plastic securing nut from the inside by hand.
Page 208 of 267
206Vehicle care
4. Carefully withdraw tail lightassembly from recess and
remove.
5. Detach the cable from the retainer.
6.Press the three retaining lugs and
remove the bulb carrier from the
light assembly.
7. Remove and replace the bulbs:
Turn signal light ( 1)
Tail light/brake light ( 2)
On version with LED tail lights and
LED brake lights, only turn signal
light bulb ( 1) can be removed and
replaced.
8. Attach the bulb carrier to the light assembly.
9. Attach the cable to the retainer.
10. Attach the light assembly to the vehicle body and tighten the
securing nut from the inside of the load compartment. Attach cover.
Depending on the version, tail lights
and brake lights are designed as
LEDs. In case of failure, have LEDs replaced by a workshop.
Page 209 of 267
Vehicle care207Light 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 recesses and
remove.
4. Detach the plug from the light assembly.
5.Press the three retaining lugs and
remove the bulb carrier from the
light assembly.
Page 210 of 267
208Vehicle careOn version with LED tail lights, theposition of the retaining lugs is
slightly different.
6. Remove and replace the bulb:
Tail light ( 1)
Rear fog light ( 2) (left side)
Reverse light ( 2) (right side)
On version with LED tail lights
only reverse light bulb ( 1) (right
side) or rear fog light bulb ( 1) (left
side) can be removed and
replaced.
7. Insert the bulb carrier into the tail light assembly. Attach plug to the
light assembly. Fit light assembly on the tailgate and tighten the
screw from the inside. Attach
cover.
Depending on the version, tail lights are designed as LEDs. In case of failure, have LEDs replaced by aworkshop.
Side turn signal lights
To replace bulb, remove lamp
housing:
1. Slide lamp to its left side and remove with its right end.