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174Vehicle caredisconnecting the main vehicle
battery or before jump starting the vehicle.
The terminals are designed for
additional electrical consumers up to a maximum of 50 A.
Jump starting 3 198.
Diesel fuel filter The diesel fuel filter is accessible from
the underside of the vehicle.
Drain filter of residual water at every
engine oil change.
Place a container underneath the
filter housing. Loosen the knurled
screw on the lower part of the filter by approx. one turn, to drain off the
water.
The filter is drained as soon as water-
free diesel fuel emerges. Retighten
the screw.
Check diesel fuel filter at shorter
intervals if the vehicle is subjected to
extreme operating conditions.
Diesel fuel system bleeding
If the fuel tank has been run dry, it will be necessary to air vent or bleed the
diesel fuel system.
Refuel then proceed as follows:With ignition key
● Switch on the ignition (key to position 2) for 5 seconds at a
time.
● Switch off ignition (key to position
1 ) for 3 seconds.
● Repeat this process multiple times.
● Start the engine (key to position 3) then switch off (key to position
0 ).
Ignition switch positions 3 133.
Page 177 of 241
Vehicle care175With power button
● Insert the electronic key in thecard reader.
● Press START/STOP without
pressing any of the pedals.
● Wait a few minutes before starting engine.
Power button 3 133.
If the engine fails to start, seek the
assistance of a workshop.
Starting the engine 3 135.
Wiper blade replacement
Wiper blades on the windscreen
Before replacing the wiper blades,
move the wiper lever to the
maintenance position (if equipped).
Windscreen wiper and washer 3 86.
Lift the wiper arm, press button to
disengage the wiper blade and
remove.
Attach new wiper blade slightly
angled to the wiper arm and push until
it engages.
Lower wiper arm carefully.
Wiper blade on the rear window
Lift wiper arm, press retaining lugs
together to disengage the wiper blade
and raise to remove.
Lower wiper arm carefully.
When attaching new wiper blade,
ensure it is engaged securely.
Page 178 of 241
176Vehicle careBulb replacement
Switch off the ignition and turn off the relevant switch or close the doors.
Only hold a new bulb at the base. Do
not touch the bulb glass with bare
hands.
Use only the same bulb type for
replacement.
Bulb check After a bulb replacement, switch on
the ignition, operate and check the
lights.
Headlights
Low beam and high beam Replace headlight bulbs from within
the engine compartment.
1. Remove protective cover by rotating it anticlockwise.
2. Detach wiring connector.
3. Release retaining clip (see illustration) and remove bulb.
4. Renew bulb and install retaining clip ensuring that bulb is in correct
orientation.
5. Reattach wiring connector and protective cover.
Sidelights / Daytime running lights
1. Remove protective cover byrotating it anticlockwise.
2. Release retaining clips and remove bulb holder from reflector
housing.
3. Renew bulb.
4. Install bulb holder in reflector housing and engage retaining
clips.
5. Install protective cover.
Page 184 of 241
182Vehicle careInstrument panel
illumination
Have bulbs replaced by a workshop.Electrical system
Fuses
Data on the replacement fuse must
match the data on the defective fuse.
There are two fuse boxes in the
vehicle:
● on the left-hand side of the instrument panel, behind the trim
panel
● in the engine compartment located next to the battery
Note
The engine compartment fuse box
should only be accessed by a
workshop.
Before replacing a fuse, turn off the
respective switch and the ignition.
There are different types of fuses inthe vehicle.
Depending on the type of fuse, a
blown fuse can be recognised by its
melted wire. Do not replace the fuse
until the cause of the fault has been
remedied.
Page 190 of 241

188Vehicle care
The tyre pressure information label
on the driver's door frame indicates
the original equipment tyres and the
correspondent tyre pressures.
Always inflate tyres to the pressures
shown on the label.
Tyre pressures 3 223.
The tyre pressure data refers to cold tyres. It applies to summer and winter tyres.
Always inflate the spare tyre to the
pressure specified for full load.
Incorrect tyre pressures will impair
safety, vehicle handling, comfort and
fuel economy and will increase tyre
wear.
Tyre pressures differ depending on
various options. For the correct tyre
pressure value, follow the procedure
below:
1. Identify the engine identifier code.
Engine data 3 212.
2. Identify the respective tyre.
The tyre pressure tables show all
possible tyre combinations 3 223.
For the tyres approved for your
vehicle, refer to the EEC Certificate of Conformity provided with your vehicle
or other national registration
documents.
The driver is responsible for correct adjustment of tyre pressure.9 Warning
If the pressure is too low, this can
result in considerable tyre warm-
up and internal damage, leading to tread separation and even to tyre
blow-out at high speeds.
9 Warning
For specific tyres the
recommended tyre pressure as
shown in the tyre pressure table may exceed the maximum tyre
pressure as indicated on the tyre.
Never exceed the maximum tyre
pressure as indicated on the tyre.
Temperature dependency
Tyre pressure depends on the
temperature of the tyre. During
driving, tyre temperature and
pressure increase.
Tyre pressure values provided on the
tyre information label and tyre
pressure chart are valid for cold tyres, which means at 20 °C. The pressure
increases by nearly 10 kPa (0.1 bar)
for a 10 °C temperature increase.
This must be considered when warm
tyres are checked.
Page 192 of 241

190Vehicle careA spare wheel or temporary spare
wheel is not equipped with pressure
sensors. The tyre pressure
monitoring system is not operational
for these wheels. For the further three wheels, the tyre pressure monitoring
system remains operational.
Control indicator w and the
corresponding message appears at
each ignition cycle until the tyres are
inflated to the correct tyre pressure.
Driver Information Centre 3 103.
Vehicle messages 3 104.
Puncture A puncture or severely under-inflated
tyre is indicated by illumination of
control indicator w together with C
3 99 and a corresponding message
appears in the Driver Information
Centre. Stop vehicle and switch off
engine.
Tyre pressure 3 223.
Tyre repair kit 3 192.
Spare wheel 3 197.
Wheel changing 3 195.Relearn function
After a puncture has been repaired
and the driver has inflated the tyres to
the correct tyre pressure, the tyre
pressure monitoring system needs to recalculate.
Tyre pressure 3 223.
Tyre repair kit 3 192.
During driving, select the tyre
pressure menu in the Driver
Information Centre by pressing button
on end of wiper lever. Press and hold button for approx. 5 seconds to
initialise recalculation. A
corresponding message appears in
the Driver Information Centre.
Several minutes of driving at a speed above 40 km/h may be required to
complete the relearn process. The system can only provide limited
information during this time.
If problems occur during the relearn
process, control indicator w remains
illuminated and a warning message is displayed in the Driver Information
Centre.
Driver Information Centre 3 103.
Vehicle messages 3 104.
General information The use of tyre chains or
commercially available liquid tyre
repair kits can impair the function of
the system. Factory-approved tyre
repair kits can be used.
Tyre repair kit 3 192.
Tyre chains 3 192.
External high-power radio equipment
could disrupt the tyre pressure
monitoring system.
Each time the tyres are replaced, the
tyre pressure monitoring system
sensors must be dismounted and
serviced by a workshop.
Page 195 of 241
Vehicle care193
3. Screw the air hose to theconnection on the sealant bottle.
4. Fit the sealant bottle into the retainer on the compressor.
Set the compressor near the tyre
in such a way that the sealant
bottle is upright.
5. Unscrew valve cap from defective
tyre.6. Screw the filler hose to the tyre valve.
7. The switch on the compressor must be set to O.
8. Connect the electrical connection cable to the power outlet or
cigarette lighter socket.
To avoid discharging the vehicle
battery, we recommend running
the engine.9. Set the rocker switch on the compressor to I. The tyre is filled
with sealant.
10. The compressor pressure gauge briefly indicates up to six bar
(600 kPa/87 psi). Then the
pressure starts to drop.
11. All of the sealant is pumped into the tyre. Then the tyre is inflated.
Page 197 of 241

Vehicle care195Seek the assistance of a
workshop.
19. Detach the tyre repair kit, return to
case and stow under the driver's
seat.9 Warning
Do not allow the sealant to contact
skin, eyes or clothing. If swallowed seek medical assistance
immediately.
Note
The driving characteristics of the
repaired tyre is severely affected,
therefore have this tyre replaced.
If unusual noise is heard or the
compressor becomes hot, turn
compressor off for at least
30 minutes.
Pay attention to storage information
and expiry date on sealant bottle. Its
sealing capability is not guaranteed
after this time.
Replace the used sealant bottle.
Dispose of the sealant bottle as
prescribed by applicable laws.
Wheel changing
Some vehicles are equipped with a
tyre repair kit instead of a spare wheel
3 192.
Make the following preparations and
observe the following information:
● Park the vehicle on a level, firm and non-slippery surface. The
front wheels must be in the
straight-ahead position.
● Apply the parking brake and engage first gear or reverse gear.
● Remove the spare wheel 3 197.
● Never change more than one wheel at a time.
● Use the jack only to change wheels in case of puncture, not
for a seasonal winter or summer
tyre change.
● The jack is maintenance-free. ● If the ground on which the vehicle
is standing is soft, a solid board
(max. 1 cm thick) should be
placed under the jack.
● Remove heavy objects out of the
vehicle before jacking up.● No people or animals may be in the vehicle when it is jacked-up.
● Never crawl under a jacked-up vehicle.
● Do not start the engine when the vehicle is raised on the jack.
● Clean wheel bolts / nuts and thread with a clean cloth before
mounting the wheel.9 Warning
Do not grease wheel bolt, wheel
nut and wheel nut cone.
1. Remove the wheel cover (using the hook supplied).
Vehicle tools 3 186.