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Driving and operating167Driving 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
1100 kg the use of a stabiliser is
strongly recommended when driving
above 80 km/h.
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 3 235.Trailer towing
Trailer loads9 Warning
Vehicles with engine A13DTE:
Use of towing equipment is
permissible for attaching
compatible bicycle carriers only.
Do not use towing equipment for
trailer towing.
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
3 224.
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.
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168Driving and operatingRear 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
80 kg (vehicles with LPG system:
110 kg), the gross vehicle weight rating may be exceeded by 70 kg
(vehicles with LPG system: 95 kg). If
the permissible rear axle load is
exceeded, a maximum speed of
100 km/h applies.
Towing equipmentCaution
When operating without a trailer,
remove the coupling ball bar.
Stowage of the detachable
coupling ball bar
The bag with the coupling ball bar is
stowed in the rear stowage
compartment on the floor.
Run the strap through the lashing eye and tighten the strap to secure the
bag.
Fitting the detachable coupling
ball bar
Disengage and fold down the socket. Remove the sealing plug from the
opening for the coupling ball bar and
stow it.
Page 171 of 251
Driving and operating169Checking the tensioning of the
coupling ball bar
● Red marking on rotary knob must
point towards green marking on
coupling ball bar.
● The gap between the rotary knob
and the coupling ball bar must be approx. 5 mm.
Otherwise, the coupling ball bar must be tensioned before being inserted:
Pull out rotary knob and turn
clockwise as far as it will go.
Inserting the coupling ball bar
Insert the tensioned coupling ball bar
in the opening and push firmly
upwards until it audibly engages.
The rotary handle snaps back into its
original position resting against the
coupling ball bar without a gap.9 Warning
Do not touch rotary handle during
insertion.
Lock the coupling ball bar by turning the key clockwise. Remove the key
and close the protective flap.
Eye for break-away stopping cable
Page 172 of 251
170Driving and operatingAttach 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 detachable
coupling ball bar
Open the protective flap and turn the
key clockwise 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.
Page 173 of 251

Vehicle care171Vehicle careGeneral Information...................172
Accessories and vehicle modifications .......................... 172
Vehicle storage ........................172
End-of-life vehicle recovery .....172
Vehicle checks ........................... 173
Performing work ......................173
Bonnet ..................................... 173
Engine oil ................................. 174
Engine coolant ......................... 175
Power steering fluid .................176
Washer fluid ............................ 176
Brakes ..................................... 176
Brake fluid ............................... 176
Vehicle battery ......................... 177
Diesel fuel system bleeding .....179
Wiper blade replacement ........179
Bulb replacement .......................180
Halogen headlights ..................180
Adaptive forward lighting .........182
Fog lights ................................. 184
Front turn signal lights .............184
Tail lights ................................. 185
Side turn signal lights ..............188
Number plate light ...................188Interior lights ............................ 189
Instrument panel illumination ...189
Electrical system ........................189
Fuses ....................................... 189
Engine compartment fuse box . 191
Instrument panel fuse box .......193
Load compartment fuse box ....194
Vehicle tools .............................. 195
Tools ........................................ 195
Wheels and tyres .......................196
Winter tyres ............................. 196
Tyre designations ....................196
Tyre pressure .......................... 197
Tyre pressure monitoring system .................................... 198
Tread depth ............................. 201
Changing tyre and wheel size . 201
Wheel covers ........................... 202
Tyre chains .............................. 202
Tyre repair kit .......................... 202
Wheel changing .......................207
Spare wheel ............................ 210
Jump starting ............................. 213
Towing ....................................... 214
Towing the vehicle ...................214
Towing another vehicle ...........215Appearance care .......................216
Exterior care ............................ 216
Interior care ............................. 218
Page 174 of 251

172Vehicle careGeneral Information
Accessories and vehicle modifications
We recommend the use of genuine
parts and accessories and factory
approved parts specific for your
vehicle type. We cannot assess or guarantee reliability of other products
- even if they have a regulatory or
otherwise granted approval.
Do not make any modifications to the electrical system, e.g. changes of
electronic control units (chip tuning).Caution
When transporting the vehicle on
a train or on a recovery vehicle, the
mud flaps might be damaged.
Vehicle storage
Storage for a long period of time
If the vehicle is to be stored for several months:
● Wash and wax the vehicle.
● Have the wax in the engine compartment and underbody
checked.
● Clean and preserve the rubber seals.
● Fill up fuel tank completely.
● Change the engine oil.
● Drain the washer fluid reservoir.
● Check the coolant antifreeze and
corrosion protection.
● Adjust tyre pressure to the value specified for full load.
● Park the vehicle in a dry, well ventilated place. Engage first or
reverse gear or set selector lever
to P. Prevent the vehicle from
rolling.
● Do not apply the parking brake.● Open the bonnet, close all doors and lock the vehicle.
● Disconnect the clamp from the negative terminal of the vehicle
battery. Beware that all systems
are not functional, e.g. anti-theft
alarm system.
Putting back into operation
When the vehicle is to be put back into
operation:
● Connect the clamp to the negative terminal of the vehicle
battery. Activate the electronics
of the power windows.
● Check tyre pressure.
● Fill up the washer fluid reservoir.
● Check the engine oil level.
● Check the coolant level.
● 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. Only entrust this work to an
authorised recycling centre.
Page 175 of 251
Vehicle care173Gas 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 uses
extremely high voltage. Do not
touch.
Bonnet
Opening
Pull the release lever and return it to
its original position.
Page 176 of 251

174Vehicle care
Press the safety catch and open the
bonnet.
Secure the bonnet support.
If the bonnet is opened during an
Autostop, the engine will be restarted automatically for safety reasons.
Closing
Before closing the bonnet, press the
support into the holder.
Lower the bonnet and allow it to fall
into the latch from a low height
(20-25 cm). Check that the bonnet is engaged.Caution
Do not press the bonnet into the
latch, to avoid dents.
Engine oil
Check the engine oil level manually
on a regular basis to prevent damage
to the engine.
Ensure that the correct specification
of oil is used. Recommended fluids
and lubricants 3 221.
The maximum engine oil
consumption is 0.6 l per 1000 km.
Check with the vehicle on a level
surface. The engine must be at
operating temperature and switched
off for at least five minutes.
Pull out the dipstick, wipe it clean,
insert it to the stop on the handle, pull
out and read the engine oil level.
Insert dipstick to the stop on the
handle and make half a turn.
Different dipsticks are used
depending on engine variant.