Driving and operating181Trailer 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 4 x
5 Watt bulbs, the function only detects
lamp outage when only a single
5 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.Driving characteristics and
towing 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
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 3 246.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).
182Driving and operatingThe permissible gross train weight
must not be exceeded. This weight is
specified on the identification plate
3 235.
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.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 100 kg, the gross vehicle weight
rating may be exceeded by 100 kg. If
the permissible rear axle load is
exceeded, a maximum speed of
60 mph applies.
Towing equipmentCaution
When operating without a trailer,
remove the coupling ball bar.
Stowage of coupling ball bar
The coupling ball bar is stowed in a
bag and must be secured in the load
compartment.
Vehicle with spare wheel
The bag with the coupling ball bar is
placed near the spare wheel under
the load floor cover.
Direct the strap through the rim and around the wheel, wrap it around the
coupling ball bar and tighten the strap
to secure the bag.
Driving and operating185Attach breakaway stopping cable to
eye.
Check that the coupling ball bar is
correctly installed
● Green marking on rotary knob must point towards green
marking on coupling ball bar.
● There must be no gap between the rotary handle and the
coupling ball bar.
● The coupling ball bar must be firmly engaged in the opening.
● The coupling ball bar must be locked and the key removed.9Warning
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 the coupling ball bar
Open the protective flap and turn the
key to position c to unlock the
coupling ball bar.
Pull out rotary handle and turn
clockwise as far as it will go. Pull out coupling ball bar downwards.
Insert sealing plug in opening. Fold away socket.
Stow and secure the coupling ball bar
as mentioned above.
186Vehicle careVehicle careGeneral Information...................187
Accessories and vehicle modifications .......................... 187
Vehicle storage ........................187
End-of-life vehicle recovery .....188
Vehicle checks ........................... 188
Performing work ......................188
Bonnet ..................................... 188
Engine oil ................................. 189
Engine coolant ......................... 190
Washer fluid ............................ 191
Brakes ..................................... 191
Brake fluid ............................... 192
Vehicle battery ......................... 192
Diesel fuel system bleeding .....193
Wiper blade replacement ........194
Bulb replacement .......................194
Halogen headlights ..................194
Adaptive forward lighting .........196
Fog lights ................................. 197
Front turn signal lights .............198
Tail lights ................................. 199
Side turn signal lights ..............200
Number plate light ...................201Interior lights ............................ 202
Instrument panel illumination ...202
Electrical system ........................202
Fuses ....................................... 202
Engine compartment fuse box . 203
Instrument panel fuse box .......205
Load compartment fuse box ....206
Vehicle tools .............................. 208
Tools ........................................ 208
Wheels and tyres .......................209
Winter tyres ............................. 209
Tyre designations ....................209
Tyre pressure monitoring
system .................................... 209
Tyre pressure .......................... 213
Tread depth ............................. 214
Changing tyre and wheel size . 214
Wheel covers ........................... 215
Tyre chains .............................. 215
Tyre repair kit .......................... 215
Wheel changing .......................218
Spare wheel ............................ 221
Jump starting ............................. 224
Towing ....................................... 226
Towing the vehicle ...................226
Towing another vehicle ...........227Appearance care .......................228
Exterior care ............................ 228
Interior care ............................. 230
208Vehicle careVehicle tools
Tools
Vehicles with spare wheel
Open the load floor cover. The jack,
the tools and a strap for securing a
damaged wheel are in the tool box
below the spare wheel in the load
compartment.
The wheel wrench and the towing eye
are in the tool bag located in the spare wheel well near the tool box. The toolbag is fixated with a tether to the stow
rod. Remove tool box and tool bag
tether from the stow rod to access the
tools in the bag.
Spare wheel 3 221.
Vehicles without spare wheel
Some tools and the towing eye are
located in a tool box in the load
compartment below the floor cover.
Vehicles without spare wheel and
flat load compartment floor
Some tools and the towing eye are
located in a bag, which is fixed at the
front left lashing eye in the load
compartment.
Vehicle care221Have the defective tyre renewed or
repaired as soon as possible.
Jacking position for lifting platform
Rear arm position of the lifting
platform centrically under the recess
of the sill.
Front arm position of the lifting
platform at the underbody.
Spare wheel If mounting a spare wheel which is
different from the other wheels, this
wheel might be classified as a
temporary spare wheel and the
corresponding speed limits apply,
even though no label indicates this.
Seek the assistance of a workshop to
check the applicable speed limit.
The spare wheel has a steel rim.
Caution
The use of a spare wheel that is smaller than the other wheels or
used in combination with winter
tyres could affect driveability.
Have the defective tyre replaced
as soon as possible.
Removing the spare wheel and
stowing a damaged wheel in the
load compartment
The spare wheel is located in the
spare wheel well beneath the floor
cover.
The spare wheel well is not designed for other tyre sizes than the spare
wheel.
To remove: 1. Close the soft top and fold in the load compartment partition by
pushing upwards at the loop area towards the inside 3 71.
Vehicle care223
9. Insert the strap through thespokes of the wheel as shown in
the illustration.
10. Mount the hook to the right rear lashing eye.
11. Tighten the strap and secure it using the buckle.
12. Place the floor cover over the damaged wheel.
13. If equipped, secure coupling ball bar in the bag to a lashing eye in
the load compartment.
14. Fold out the load compartment partition before opening the soft
top.
Stowing the spare wheel back in
the well after replacing the
damaged wheel
1. Close the soft top and fold in the load compartment partition.
2. Remove floor cover, loosen and remove wing nut and conus.
3. Stow the tools in the tool box and the bag.
4. Place spare wheel facing upwards in the well.
5. Insert and turn the excentric conus in the recess of the spare
wheel so that the wheel is
positioned as far as possible
towards the front. Secure the
wheel by turning the wing nut
clockwise.
6. Insert and close floor cover.9 Warning
Storing a jack, a wheel or other
equipment in the load
compartment could cause injury if they are not secured properly.
During a sudden stop or a
collision, loose equipment could cause personal injury or damage
to the load or vehicle.
Always store jack and tools in the
respective storage compartments
and secure them by fixing.
Damaged wheel placed in the load compartment must always be
secured with the strap.
224Vehicle careTemporary spare wheelCaution
The use of a spare wheel that issmaller than the other wheels or in combination with winter tyres
could affect driveability. Have the defective tyre replaced as soon as
possible.
Only mount one temporary spare
wheel. Do not drive faster than
50 mph. Take curves slowly. Do not
use for a long period of time.
If your vehicle gets a flat tyre on the
rear while towing another vehicle,
mount the temporary spare wheel at
the front and the full size tyre at the
rear.
Tyre chains 3 215.
Spare wheel with directional tyre
Fit directional tyres such that they roll in the direction of travel. The rolling
direction is indicated by a symbol
(e.g. an arrow) on the sidewall.
The following applies to tyres fitted
opposing the rolling direction:
● Driveability may be affected. Have the defective tyre renewed
or repaired as soon as possible
and fit it instead of the spare
wheel.
● Drive particularly carefully on wet
and snow-covered road
surfaces.Jump starting
Do not start with quick charger.
A vehicle with a discharged vehicle
battery can be started using jump
leads and the vehicle battery of
another vehicle.9 Warning
Be extremely careful when starting
with jump leads. Any deviation
from the following instructions can
lead to injuries or damage caused
by battery explosion or damage to the electrical systems of both
vehicles.
9 Warning
Avoid contact of the battery with
eyes, skin, fabrics and painted
surfaces. The fluid contains
sulphuric acid which can cause
injuries and damage in the event
of direct contact.
● Never expose the battery to naked flames or sparks.