Page 208 of 289

206Driving and operatingBy driving uphill, the temperature of
the coolant is increased. To reduce
heating, drive at a reduced speed and
pay attention to the coolant
temperature. If the control indicator
2 of the engine coolant temperature
gauge illuminates, stop the vehicle
and switch off engine as soon as
possible.
Trailer towing Trailer loadsThe 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 airbecoming 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
3 264.
When distributing the loads in the
trailer, heavy objects should be
placed as close as possible to the
axle.
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 is specified on the
towing equipment identification plate
and in the vehicle documents.Always aim for the maximum vertical
coupling 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
60 kg , the gross vehicle weight rating
must not be exceeded. If the
permissible rear axle load is
exceeded, a maximum speed of
60 mph applies.
Towing equipment Depending on version the vehicle canbe fitted with a detachable or a fixed
coupling ball bar.
Type ACaution
When operating without a trailer,
remove the coupling ball bar.
Page 210 of 289
208Driving and operating9Warning
Towing a trailer is permitted only
when a coupling ball bar is fitted correctly. If the coupling ball bardoes not engage correctly, seekthe assistance of a workshop.
Dismounting coupling ball bar
1. Disconnect the trailer plug.
2. Unfasten the breakaway stopping
cable.
3. Remove the trailer.
4. Take off the cap.
5. Insert the key in the plug lock, unlock it and remove it from the
opening.
6. Move 1 to left and hold it pressed,
push 2 to the back and remove the
coupling ball.
7. Swivel the connecting socket upwards. Put on the cap.
Type B 1. Swivel the connecting socket downwards.
2. Attach the trailer.
3. Connect the trailer plug to the socket and fasten the breakaway
stopping cable to the eye on the
carrier.
Page 211 of 289
Driving and operating209Type C
1. Remove the safety splint.
2.Pull the lever and open the towing
ring.
3. Swivel the connecting socket downwards.
4. Attach the trailer, close the towing
ring and fix the splint.
5. Connect the trailer plug to the socket and attach the breakaway
stopping cable to the eye on the
carrier.
Type D 1. Swivel the connecting socket downwards.
2. Attach the trailer.
3. Connect the trailer plug to the socket and fasten the breakaway
stopping cable to the eye on the
carrier.
Trailer stability assist
If the system detects snaking
movements, engine power is reduced
and the vehicle / trailer combination is
selectively braked until the snaking ceases. While system is working keep
steering wheel as still as possible.
Trailer stability assist is a function of
the Electronic Stability Control 3 170.
Page 212 of 289

210Vehicle careVehicle careGeneral Information...................211
Accessories and vehicle modifications .......................... 211
Vehicle storage ........................211
End-of-life vehicle recovery .....212
Vehicle checks ........................... 212
Performing work ......................212
Bonnet ..................................... 213
Engine oil ................................. 213
Engine coolant ......................... 214
Washer fluid ............................ 215
Brakes ..................................... 216
Brake fluid ............................... 216
Vehicle battery ......................... 216
Diesel fuel system bleeding .....218
Wiper blade replacement ........219
Bulb replacement .......................219
Halogen headlights ..................219
Xenon headlights .....................223
Front fog lights ......................... 224
Front turn lights .......................224
Tail lights ................................. 225
Side turn lights ......................... 228
Centre high-mounted brake light ......................................... 228Number plate light...................229
Interior lights ............................ 230
Electrical system ........................230
Fuses ....................................... 230
Engine compartment fuse box . 231
Instrument panel fuse box .......231
Vehicle tools .............................. 234
Tools ........................................ 234
Wheels and tyres .......................236
Winter tyres ............................. 236
Tyre designations ....................236
Tyre pressure .......................... 237
Tyre deflation detection
system .................................... 238
Tread depth ............................. 239
Changing tyre and wheel size . 239
Wheel covers ........................... 240
Tyre chains .............................. 240
Tyre repair kit .......................... 240
Wheel changing .......................244
Spare wheel ............................ 245
Jump starting ............................. 249
Towing ....................................... 251
Towing the vehicle ...................251
Towing another vehicle ...........252
Appearance care .......................253
Exterior care ............................ 253Interior care............................. 255
Floor mats ............................... 256
Page 237 of 289
Vehicle care235
4. Unclip retainers on the box coverand open it.
Stowing the box1. Insert the box with the front inclined upwards. To take it past
bar 2, push the box in and down.
2. Once the box is in the housing,
push it down and slide latches
outwards to secure it.
Vehicles with spare wheel
The box contains:
1. a wheelbrace for removing the wheel bolts and operating the
jack.
2. a jack to raise the vehicle.
3. wheel bolt cap or hub cap removal
tools. These tools are designed to
remove the wheel bolt head
covers on alloy wheels or the hub
cap on steel wheels.
4. a wheelbrace adapter for the security wheel bolts.
5. a towing eye.
Page 238 of 289

236Vehicle careVehicles without spare wheel
The box contains a towing eye and a
tyre repair kit.
Tyre repair kit 3 240.
Wheels and tyres
Tyre condition, wheel condition Drive over edges slowly and at right
angles if possible. Driving over sharp
edges can cause tyre and wheel
damage. Do not trap tyres on the kerb when parking.
Regularly check the wheels for
damage. Seek the assistance of a
workshop in the event of damage or
unusual wear.
Winter tyres
Winter tyres improve driving safety at temperatures below 7 °C and should
therefore be fitted on all wheels.
In accordance with country-specific
regulations, affix the speed sticker in
the driver's field of view.
All tyre sizes are permitted as winter
tyres 3 271.Tyre designations
E.g. 225/55 R 18 98 V225:tyre width, mm55:cross-section ratio (tyre height
to tyre width), %R:belt type: RadialRF:type: RunFlat18:wheel diameter, inches98:load index e.g. 98 is equivalent
to 750 kgV:speed code letter
Speed code letter:
Q:up to 100 mphS:up to 112 mphT:up to 118 mphH:up to 130 mphV:up to 150 mphW:up to 168 mph
Choose a tyre appropriate for the
maximum speed of your vehicle.
Refer to the EEC Certificate of
Conformity provided with your vehicle
or other national registration
documents. Optional equipment
could reduce the maximum speed of
the vehicle.
Page 253 of 289

Vehicle care251Towing
Towing the vehicle
Press in the middle of the cover plate
and slide to the upper left corner to
unclip it.
The towing eye is stowed with the vehicle tools 3 234.
Screw in the towing eye clockwise as
far as it will go until it stops in a
horizontal position.
Attach a tow rope – or better 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.
Caution
Deactivate the driver assistance
systems like active emergency
braking 3 188, otherwise the
vehicle may automatically brake during towing.
Switch the selector lever to neutral.
Release the parking brake.
Caution
Never tow a vehicle equipped with All Wheel Drive (AWD) with the
front or rear tyres on the road. If
you tow a vehicle equipped with
AWD while the front or rear tyres
are rolling on the road, the drive
system in the vehicle could be
severely damaged. When towing
vehicles equipped with AWD, all
four tyres must not be in contact
with the road.
Page 254 of 289

252Vehicle careCaution
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.
Seek the assistance of a workshop. After towing, unscrew the towing eye.
Insert cap with the flange into the
recess and fix cap by pushing.
Towing another vehicle
On the rear bumper, press the cover
plate on its upper left corner to unclip it.
The towing eye is stowed with the
vehicle tools 3 234.
Screw in the towing eye clockwise as
far as it will go until it stops in a
horizontal position.
The lashing eye at the rear
underneath the vehicle must never be used as a towing eye.
Attach a tow rope – or better a tow rod
– to the towing eye.
The towing eye must only be used for towing and not for recovering a
vehicle.