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Driving and operating185Trailer 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
1000 kg a speed of 50 mph must not
be exceeded; the use of a stabiliser is
recommended.
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 3 254.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 loads apply 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).
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190Vehicle careVehicle careGeneral Information...................191
Accessories and vehicle modifications .......................... 191
Vehicle storage ........................191
End-of-life vehicle recovery .....192
Vehicle checks ........................... 192
Performing work ......................192
Bonnet ..................................... 192
Engine oil ................................. 193
Engine coolant ......................... 194
Washer fluid ............................ 196
Brakes ..................................... 196
Brake fluid ............................... 196
Vehicle battery ......................... 196
Diesel fuel system bleeding .....198
Wiper blade replacement ........198
Bulb replacement .......................199
Halogen headlights ..................199
Xenon headlights .....................201
Fog lights ................................. 202
Front turn signal lights .............203
Tail lights ................................. 203
Side turn signal lights ..............205
Centre high-mounted brake light ......................................... 206Number plate light...................206
Interior lights ............................ 206
Instrument panel illumination ...206
Electrical system ........................207
Fuses ....................................... 207
Engine compartment fuse box . 208
Instrument panel fuse box .......210
Vehicle tools .............................. 212
Tools ........................................ 212
Wheels and tyres .......................213
Winter tyres ............................. 213
Tyre designations ....................213
Tyre pressure .......................... 213
Tyre pressure monitoring system .................................... 215
Tread depth ............................. 219
Changing tyre and wheel size . 219
Wheel covers ........................... 220
Tyre chains .............................. 220
Tyre repair kit .......................... 220
Wheel changing .......................225
Spare wheel ............................ 228
Jump starting ............................. 230
Towing ....................................... 231
Towing the vehicle ...................231
Towing another vehicle ...........232Appearance care .......................233
Exterior care ............................ 233
Interior care ............................. 236
Page 206 of 271
204Vehicle care
4. Press the retaining lugs andremove the bulb carrier from the
light assembly.
5. Remove and replace the bulb by pushing the bulb slightly into thesocket and rotating anticlockwise:
Tail light/Brake light ( 1)
Turn signal light ( 2)
6. Insert and turn bulb clockwise into
the tail light assembly. Fit light
assembly with the retaining pins
into the recesses of the vehicle
body and tighten the plastic
securing nuts from inside the load
compartment.
Close cover and engage.
Reversing light/rear fog light Reversing light is located on the left
light assembly in the tailgate, and the rear fog light is located on the right
light assembly in the tailgate.
The description of bulb replacement
is the same for both lights.
1. Remove screw from the tailgate.
2. Move light assembly slightly to the
outside, then withdraw from the
tailgate.
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206Vehicle care4. Insert bulb holder and turnclockwise.
5. Insert left end of the lamp, slide to
the left and insert right end.
Centre high-mounted brake light
Have LEDs replaced by a workshop.
Number plate light
1. Insert screwdriver in recess of the
cover, press to the side and
release spring.
2. Remove lamp downwards, taking care not to pull on the cable.
3. Remove bulb holder from lamp housing by turning anticlockwise.
4. Pull bulb from bulb holder andreplace it.
5. Insert bulb holder into lamp housing and turn clockwise.
6. Insert lamp into bumper and let engage.
Interior lights
Courtesy light, reading lights Have bulbs replaced by a workshop.
Load compartment light
Have bulbs replaced by a workshop.
Dome light
Have bulbs replaced by a workshop.
Instrument panel
illumination
Have bulbs replaced by a workshop.
Page 211 of 271
Vehicle care209No.Circuit14Heated exterior mirror15–16Brake booster kit17Ignition, crank power supply18Engine control module19Fuel pump20–21Engine solenoids, engine
sensors22–23Injection system24Washer system25–26Engine sensors27Heater shut off valve28Engine control module29Engine control moduleNo.Circuit30Engine control module31High beam left, Xenon low
beam left32High beam right, Xenon low
beam right33Engine control module34Horn35Air condition compressor clutch36Front fog lights
Page 213 of 271
Vehicle care211No.Circuit1–2–3Power windows4Voltage transformer5Body control module 16Body control module 27Body control module 38Body control module 49Body control module 510Body control module 611Body control module 712Body control module 813–14Tailgate15Airbag system16Data link connection17IgnitionNo.Circuit18Air conditioning system19Sunroof20Parking assist/Rain sensor/
Front camera21Brake switch22Audio system23Display24–25Auxiliary jack26Instrument panel27–28–29–30–31Horn32–33Heated steering wheelNo.Circuit34–35Tyre repair kit36–37Rear wiper38Cigarette lighter39Power windows/Sunroof/Auto‐
matic transmission display40–
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Vehicle care217The menu Tyre Load only appears
when the vehicle is at a standstill and
the parking brake is applied. On
vehicles with automatic transmission, the selector lever must be in P.
Midlevel display:
Select ● LO for comfort pressure up to
three people.
● ECO for Eco pressure up to
three people.
● Hi for full loading.
Uplevel display:
Select ● Light for comfort pressure up to
three people.
● Eco for Eco pressure up to
three people.
● Max for full loading.
Tyre pressure 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 tyre
pressure sensors were replaced. The
tyre pressure sensor matching
process should also be performed
after replacing a spare wheel with a
road wheel containing a tyre pressure
sensor.
The malfunction light w and the
warning message or code should
extinguish at the next ignition cycle.
The sensors are matched to the
wheel positions, using a 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 a workshop for service. There are two minutes to match the first
wheel position, and five minutes
overall to match all four wheel
positions. If it takes longer, the
matching process stops and must be
restarted.
The tyre pressure sensor matching
process is:
1. Apply the parking brake.
2. Turn the ignition on.
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232Vehicle care
Screw in the towing eye as far as it will
go until it stops in a horizontal
position.
Attach a tow rope – or better still a tow
rod – to the towing eye.
The towing eye must only be used for towing and not for recovering the
vehicle.
Switch on ignition to release steering
wheel lock and to permit operation of
brake lights, horn and windscreen
wiper.
Switch the selector lever to neutral.
Release the parking brake.
Caution
Drive slowly. Do not drive jerkily.
Excessive tractive force can
damage the vehicle.
When the engine is not running,
considerably more force is needed to
brake and steer.
To prevent the entry of exhaust gases from the towing vehicle, switch on the
air recirculation and close the
windows.
Vehicles with automatic transmission: the vehicle must be towed facing
forwards, not faster than 50 mph nor
further than 60 miles. In all other
cases and when the transmission is
defective, the front axle must be
raised off the ground.
Vehicles with manual transmission
automated: the vehicle must only be
towed facing forwards with the front
axle raised off the ground.
Seek the assistance of a workshop. After towing, unscrew the towing eye.
Insert cap at the top and engage
downwards.
Towing another vehicle
Insert a screwdriver in the slot at the
lower bend of the cap. Release the
cap by carefully moving the
screwdriver downwards.
The towing eye is stowed with the
vehicle tools 3 212.