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Driving and operating223Trailer towingTrailer 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 12%.
The permissible trailer load applies
up to the specified incline and at 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 altitude. The
gross train weight does not have to be reduced when driving on roads with
slight inclines (less than 8%, e.g.
motorways).The permissible gross train weight must not be exceeded. This weight is
specified on the identification plate
3 279.
Vertical coupling load
The vertical coupling load is the load
exerted by the trailer on the coupling
ball. It can be varied by changing the
weight distribution when loading the
trailer.
The maximum permissible vertical
coupling load (85 kg) is specified on
the towing equipment identification
plate and in the vehicle documents.
Always aim for the maximum load,
especially in the case of heavy
trailers. The vertical coupling load
should never fall below 25 kg.Rear axle load
When the trailer is coupled and the
towing vehicle fully loaded, the
permissible rear axle load (see
identification plate or vehicle
documents) may be exceeded by 90 kg for the 5-door Hatchback/4-
door Saloon and 85 kg for the Sports
Tourer/Country Tourer, the gross
vehicle weight rating may be
exceeded by 65 kg for the 5-door
Hatchback/4-door Saloon and 60 kg for the Sports Tourer/Country Tourer. If the permissible rear axle load is
exceeded, a maximum speed of
100 km/h applies.
Towing equipmentCaution
The folding coupling ball bar
cannot be removed from the
vehicle. When driving without a
trailer, fold in the coupling ball bar.
Page 228 of 327

226Vehicle careVehicle careGeneral Information...................227
Accessories and vehicle modifications .......................... 227
Vehicle storage ........................227
End-of-life vehicle recovery .....228
Vehicle checks ........................... 228
Performing work ......................228
Bonnet ..................................... 228
Engine oil ................................. 229
Automatic transmission fluid ....230
Engine coolant ......................... 231
Power steering fluid .................232
Washer fluid ............................ 232
Brakes ..................................... 233
Brake fluid ............................... 233
Vehicle battery ......................... 233
Diesel fuel system bleeding .....235
Wiper blade replacement ........235
Bulb replacement .......................236
Halogen headlights ..................237
Xenon headlights .....................239
Fog lights ................................. 241
Tail lights ................................. 242
Side turn signal lights ..............244
Number plate light ...................245Interior lights ............................ 246
Instrument panel illumination ...246
Electrical system ........................246
Fuses ....................................... 246
Engine compartment fuse box . 248
Instrument panel fuse box .......250
Load compartment fuse box ....251
Vehicle tools .............................. 253
Tools ........................................ 253
Wheels and tyres .......................254
Winter tyres ............................. 254
Tyre designations ....................254
Tyre pressure .......................... 254
Tyre pressure monitoring system .................................... 256
Tread depth ............................. 257
Changing tyre and wheel size . 258
Wheel covers ........................... 258
Tyre chains .............................. 259
Tyre repair kit .......................... 259
Wheel changing .......................262
Spare wheel ............................ 264
Jump starting ............................. 267
Towing ....................................... 268
Towing the vehicle ...................268
Towing another vehicle ...........270Appearance care .......................272
Exterior care ............................ 272
Interior care ............................. 274
Page 230 of 327
228Vehicle care● Since the durability of AdBlue islimited to two years, fluid should
be exchanged if it is too old. Seek the assistance of a workshop.
● Fit the number plate if necessary.
End-of-life vehicle recovery
Information on end-of-life vehicle
recovery centres and the recycling of
end-of-life vehicles is available on our website, where legally required. Only
entrust this work to an authorised
recycling centre.
Gas vehicles must be recycled by a
service centre authorised for gas
vehicles.Vehicle 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.
Page 238 of 327
236Vehicle care
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 the wiper arm. Press the two
catches on the arm, 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.
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.
Page 239 of 327
Vehicle care237Halogen headlights
Bi-Halogen Headlight (1) with one
bulb for low and high beam.
Sidelight/Daytime running light (2) .
Front turn signal light (3)
Bi-Halogen Headlight (1)
On left vehicle side, pull filling pipe out
of the windscreen washer fluid
container.
1. Rotate the cap anticlockwise and remove it.
2. Rotate the bulb holderanticlockwise to disengage.
Withdraw the bulb holder from the
reflector.
Page 240 of 327
238Vehicle care
3. Disengage the bulb holder fromthe plug connector by slightly
bending apart the retaining lug.
4. Replace the bulb and connect with the plug.
5. Insert the bulb holder, engaging the two lugs into the reflector androtate clockwise to secure.
6. Fit the cap and rotate clockwise.
Sidelight/Daytime running light
(2)
1. Rotate cap anticlockwise and withdraw from the reflector.
2. Press snap-in tongues togetherand move socket out of the
housing.
3. Remove the bulb from the socket by pulling.
4. Replace and insert new bulb into socket.
5. Insert the bulb socket into the housing and let engage.
6. Fit the cap and rotate clockwise.
Page 241 of 327
Vehicle care239Sidelight/Daytime running light
with LEDs
On another version, sidelight and
daytime running lights are designed
as LEDs. In case of failure, have
LEDs replaced by a workshop.
Front turn light (3)
1. Rotate bulb socket anticlockwise to disengage. Withdraw the bulb
socket from the housing.
2. Push bulb into socket slightly, rotate anti-clockwise and remove.
3. Replace and insert new bulb into socket by rotating clockwise.
4. Insert bulb socket in reflector, rotate clockwise to engage.
Xenon headlights9 Danger
Adaptive forward lighting system
uses Xenon headlights.
Xenon headlights work under
extremely high electrical voltage.
Do not touch. Have bulbs replaced by a workshop.
Bulbs for front turn signal and
corner lighting can be changed.
Sidelight/Daytime running lights are
designed as Light Emitting Diodes
(LEDs) and cannot be replaced.
Page 242 of 327
240Vehicle careCorner lighting
1. Rotate the cap anticlockwise andremove it.
2. Rotate the bulb holderanticlockwise to disengage.
Withdraw the bulb holder from the
reflector.
3. Disengage the bulb from the plug connector by unlatching and
pulling.
4. Replace the bulb and connect bulb holder with the plug
connector.
5. Insert the bulb holder, engaging the two lugs into the reflector and
rotate clockwise to secure.
6. Fit the cap and rotate clockwise.
Front turn signal
1. Rotate the cap anticlockwise and remove it.