Page 222 of 341

220Driving and operatingDriving characteristics andtowing tips
Before attaching a trailer, lubricate the 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 (Sports tourer: 1200 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 3 307.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).The permissible gross train weight
must not be exceeded. This weight is specified on the identification plate
3 288.
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 (75 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.
Page 227 of 341

Vehicle care225Vehicle careGeneral Information...................226
Accessories and vehicle modifications .......................... 226
Vehicle storage ........................226
End-of-life vehicle recovery .....226
Vehicle checks ........................... 227
Performing work ......................227
Bonnet ..................................... 227
Engine oil ................................. 228
Engine coolant ......................... 229
Power steering fluid .................230
Washer fluid ............................ 230
Brakes ..................................... 231
Brake fluid ............................... 231
Vehicle battery ......................... 231
Diesel fuel system bleeding .....233
Wiper blade replacement ........233
Bulb replacement .......................234
Halogen headlights ..................234
Adaptive forward lighting .........237
Fog lights ................................. 238
Front turn signal lights .............240
Tail lights ................................. 242
Side turn signal lights ..............250
Number plate light ...................251Interior lights ............................ 252
Instrument panel illumination ...252
Electrical system ........................252
Fuses ....................................... 252
Engine compartment fuse box . 253
Instrument panel fuse box .......255
Load compartment fuse box ....256
Vehicle tools .............................. 259
Tools ........................................ 259
Wheels and tyres .......................261
Winter tyres ............................. 261
Tyre designations ....................261
Tyre pressure .......................... 261
Tyre pressure monitoring system .................................... 262
Tread depth ............................. 265
Changing tyre and wheel size . 266
Wheel covers ........................... 266
Tyre chains .............................. 266
Tyre repair kit .......................... 267
Wheel changing .......................270
Spare wheel ............................ 274
Jump starting ............................. 278
Towing ....................................... 280
Towing the vehicle ...................280
Towing another vehicle ...........281Appearance care .......................282
Exterior care ............................ 282
Interior care ............................. 284
Page 245 of 341
Vehicle care243
2. Unscrew the plastic securing nutfrom the inside by hand.
3. Carefully withdraw the tail lightassembly from recesses and
remove. Make sure that the cable duct remains in position.
4. Detach the cable from the retainer.
5. Detach the wiring plug from the bulb carrier.
6. Unscrew the three screws with a screwdriver and remove the bulb
carrier from the light assembly.
7. Remove and replace the bulb by withdrawing or pushing the bulb
slightly into the socket and
rotating anticlockwise:
Tail light ( 1)
Brake light ( 2)
Turn signal light ( 3)
8. Insert the bulb carrier into the tail light assembly and screw into
place. Connect the wiring plug
and press the cable into the
retainer. Fit light assembly with
the retaining pins into the
recesses of the vehicle body and
tighten the plastic securing nut
Page 247 of 341
Vehicle care245
2.Unscrew two plastic securing nuts
from the inside by hand.
3. Carefully withdraw tail light assembly from recesses and
remove. Make sure that the cable duct remains in position.
4. Detach wiring plug from bulb carrier.
5. Remove the bulb holder by turning and replace the bulb by
withdrawing or pushing the bulb
slightly into the socket and rotating anticlockwise:
Tail light/Brake light ( 1)
Turn signal light ( 2)
6. Insert bulb holder and turn clockwise. Connect the wiring
plug. Fit light assembly with the
retaining pins into the recesses of
the vehicle body and tighten the
plastic securing nuts from the
inside of the load compartment.
Attach cover.
Light assembly in the tailgate
1. Open the tailgate and remove the
cover on the respective side.
Page 249 of 341
Vehicle care2474. Carefully withdraw tail lightassembly from recesses and
remove. Make sure that the cable duct remains in position.
5. Detach wiring plug from bulb carrier.
6. Remove the bulb holder by turning anticlockwise and replace
the bulb by withdrawing or
pushing the bulb slightly into the
socket and rotating anticlockwise:
Tail lights ( 1 + 2)
Turn signal light ( 3)
Brake light ( 4)
7. Connect the wiring plug and press
the cable into the retainer. Fit light
assembly with the retaining pins
into the recesses of the vehicle
body and tighten the plastic
securing nuts from the inside of
the load compartment. Attach
cover.
When assembling press the blind
on the left-hand side into the
rubber grommets to reach full
retention force.
Light assembly in the tailgate
1. Open the tailgate and remove the
blind covers on the respective
side.
2. Unscrew and remove the screws. 3. Remove the tail light assembly and detach wiring plug from the
bulb carrier.
Page 251 of 341

Vehicle care249
2. Unscrew both plastic securingnuts from the inside by hand.
3. Carefully withdraw the lightassembly from the recesses and
remove.
4. Detach wiring plug from bulb carrier.
5. Remove the bulb holder by turning and replace the bulb by
withdrawing or pushing the bulb
slightly into the socket and rotating anticlockwise:
Tail light/Brake light ( 1)
Turn signal light ( 2)
version with Light Emitting Diode
(LED)
Only turn signal light ( 2) can be
changed.
6. Insert and turn bulb holder clockwise into the tail light
assembly. Connect the wiring
plug with the light assembly. Fit
light assembly with the retaining
pins into the recesses of the
vehicle body and tighten the
plastic securing nuts from the
inside of the load compartment.
Close cover and engage.
Light assembly in the tailgate
1. Open the tailgate and remove the
covers on the respective side.
2. Unscrew three screws.
3. Remove the tail light assembly from tailgate.
4. Remove the bulb holder by turning and replace the bulb by
withdrawing or pushing the bulb
Page 256 of 341
254Vehicle careNo.Circuit1Engine control module2Lambda sensor3Fuel injection/Ignition system4Fuel injection/Ignition system5–6Mirror heating/Anti-theft alarm
system7Fan control/Engine control
module/Transmission control
module8Lambda sensor/Engine cooling9Rear window sensor10Vehicle battery sensor11Trunk release12Adaptive forward lighting/Auto‐
matic light control13ABS14Rear window wiper15Engine control moduleNo.Circuit16Starter17Transmission control module18Heated rear window19Front power windows20Rear power windows21Rear electrical centre22Left high beam (Halogen)23Headlamp washer system24Right low beam (Xenon)25Left low beam (Xenon)26Front fog lights27Diesel fuel heating28Start stop system29Electric parking brake30ABS31Adaptive cruise control32Airbag
Page 266 of 341

264Vehicle careOperating electronic devices or beingclose to facilities using similar wave
frequencies could disrupt the tyre
pressure monitoring system.
Each time the tyres are replaced, tyre
pressure monitoring system sensors
must be dismounted and serviced.
For the screwed sensor: replace
valve core and sealing ring. For
clipped sensor: replace complete
valve stem.
Vehicle loading status
Adjust tyre pressure to load condition according to the tyre information labelor tyre pressure chart 3 307, and
select the appropriate setting in the Tyre load menu in the Driver
Information Centre (DIC) 3 118. This
setting is the reference for the tyre
pressure warnings.
The menu Tyre Load only appears if
the vehicle is in a standstill and the
parking brake is applied. On vehicles
with automatic transmission the
selector lever has to be in P.
Select:
● Light for comfort pressure up to
3 people.
● Eco for Eco pressure up to
3 people.
● Max for full load.
TPMS sensor matching process Each TPMS sensor has a unique
identification code. The identification
code must be matched to a new
wheel position after rotating the
wheels or exchanging the complete
wheel set and if one or more TPMS sensors were replaced. The TPMS
sensor matching process should also
be performed after replacing a spare
wheel with a road wheel containing
the TPMS sensor.
The malfunction light w and the
warning message or code should go
off at the next ignition cycle. The
sensors are matched to the wheel
positions, using a TPMS relearn tool,
in the following order: left side front
wheel, right side front wheel, right
side rear wheel and left side rear
wheel. The turn signal light at the
current active position is illuminated
until sensor is matched.
Consult your workshop for service or
to purchase a relearn tool. There are
2 minutes to match the first wheel position, and 5 minutes overall to
match all four wheel positions. If it
takes longer, the matching process
stops and must be restarted.
The TPMS sensor matching process
is:
1. Apply the parking brake; on vehicles with automatic
transmission set the selector lever
to P.
2. Turn the ignition on.