Page 138 of 197

136Vehicle careBrakesIn the event of minimum thickness of
the brake lining, a squealing noise
sounds during braking.
Continued driving is possible but
have the brake lining replaced as
soon as possible.
Once new brake linings are installed,
do not brake unnecessarily hard for
the first few journeys.
Brake fluid9 Warning
Brake fluid is poisonous and
corrosive. Avoid contact with eyes, skin, fabrics and painted surfaces.
The brake fluid level must be betweenthe MIN and MAX marks.
If fluid level is below MIN seek the
assistance of a workshop.
Brake and clutch fluid 3 170.
Vehicle battery
The vehicle battery is maintenance-
free provided that the driving profile
allows sufficient charging of the
battery. Short-distance-driving and
frequent engine starts can discharge
the vehicle battery. Avoid the use of
unnecessary electrical consumers.
Batteries do not belong in household
waste. They must be disposed of at
an appropriate recycling collection
point.
Laying up the vehicle for more than
four weeks can lead to vehicle battery
discharge. Disconnect the clamp from
the negative terminal of the vehicle
battery.
Ensure the ignition is switched off
before connecting or disconnecting
the vehicle battery.
The anti-theft alarm siren must be deactivated as follows: Switch theignition on then off, disconnect the
vehicle's battery within 15 seconds.
Battery discharge protection 3 93.
Page 143 of 197
Vehicle care141
2. Disconnect the electricalconnector from the bulb holder.
3. Remove the bulb assembly anticlockwise and pull it straight
out.
4. Insert a new bulb assembly straight into the lamp and rotate
clockwise.
5. Reconnect the electrical connector.
Front turn signal lights
1. Rotate the bulb holderanticlockwise and remove.
2. Rotate bulb anticlockwise and remove from bulb holder.
3. Replace bulb.
4. Insert the bulb holder into the reflector and rotate clockwise.
Tail lightsTail lights, turn signal lights, brake
lights and reversing lights
1. Unscrew both screws.
2. Remove tail light assembly. Take care that the cable duct remains in
position.
Page 144 of 197
142Vehicle care
3. tail light / brake light 1
turn signal light 2
tail light 3
reversing light (passenger side) /
rear fog light (driver's side) 4.4. Rotate bulb holder anticlockwise.
5. Remove bulb holder. Push bulb
into socket slightly, rotate anti-
clockwise, remove and renew
bulb.
6. Insert bulb holder into the tail light
assembly and screw into place.
Connect wiring plug. Install tail
light assembly in body and tighten screws. Close covers and
engage.
7. Switch on ignition, operate and check all lights.
Side turn signal lights
To replace bulb, remove lamp
housing:
1. Slide lamp to the front and remove
it out of the front wing with the rear
end.
Page 145 of 197
Vehicle care143
2. Turn bulb holder anticlockwiseand remove from housing.
3. Pull bulb from bulb holder andreplace it.
4. Insert bulb holder and turnclockwise.
5. Insert front end into front wing, slide forward and insert rear end.
Centre high-mounted brake light
Have LEDs replaced by a workshop.
Number plate light
1. Unscrew both screws.
2. Remove bulb housing downwards, taking care not to pull
on the cable.
Rotate bulb holder anticlockwise
to disengage.
3. Remove bulb from bulb holder and replace it.
4. Insert bulb holder into bulb housing and turn clockwise.
5. Insert bulb housing and secure using a screwdriver.
Page 149 of 197
Vehicle care147No.Circuit18Engine control module219Injection system/Ignition20Air conditioning system21Battery sensor22Electric steering column lock23Cooling fan low24–25Exterior mirror switch26Engine control module/Manual
transmission automated
module27Fuel system28Brake switch29Seat occupancy recognition30Headlight range adjustment31Horn32Front fog light33High beam leftNo.Circuit34High beam right35–36Rear wiper37Cornering light left38Washer system39Cornering light right40–41–42Starter 243Instrument panel44Manual transmission auto‐
mated45Starter 146ABS47Cooling fan high48Front wiper49Body control module/Retained
power offAfter having changed defective fuses
close the fuse box cover and press
until it engages.
If the fuse box cover is not closed
correctly, malfunction may occur.
Instrument panel fuse box
The fuse box is located on the driver's
side behind a cover in the instrument
panel.
To open the compartment, compress
the locking tabs, fold cover down and remove.
Page 155 of 197

Vehicle care153If w flashes for 60-90 seconds then
illuminates continuously, there is a fault in the system. Consult a
workshop.
After inflating, some driving may be
required to update the tyre pressure
values in the Driver Information
Centre. During this time w may
illuminate.
If w illuminates at lower temperatures
and extinguishes after some driving,
this could be an indicator for
approaching a low tyre pressure
condition. Check tyre pressure.
Vehicle messages 3 79.
If the tyre pressure must be reduced
or increased, switch off ignition.
Only mount wheels with pressure
sensors, otherwise the tyre pressure
will not be displayed and w
illuminates continuously.
A temporary spare wheel is not
equipped with pressure sensors. The
tyre pressure monitoring system is
not operational for these tyres.
Control indicator w illuminates. For
the further three tyres, the system
remains operational.The use of commercially-available
liquid tyre repair kits can impair the
function of the system. Factory-
approved repair kits can be used.
Operating electronic devices or being
close to facilities using similar wave
frequencies could disrupt the tyre
pressure monitoring system.
Each time the tyres are replaced, tyre pressure monitoring system sensors
must be dismounted and serviced.
For the screwed sensor; replace
valve core and sealing ring. For the
clipped sensor; replace complete
valve stem.
Vehicle loading status
Adjust tyre pressure to load condition according to the tyre information label
or tyre pressure chart 3 182, and
select the appropriate setting in the
menu Tyre Load in the Driver
Information Centre, Vehicle
Information Menu 3 73 . This setting is
the reference for the tyre pressure
warnings.The Tyre Load menu only appears if
the vehicle is in a standstill and the
parking brake is applied. On vehicles
with automatic transmission the
selector lever has to be in P.
Select:
● Lo for comfort pressure up to
3 people.
● Eco for Eco pressure up to
3 people.
● Hi for full loading.
Page 156 of 197

154Vehicle careTyre pressure sensor matching
process
Each tyre pressure sensor has a
unique identification code. The
identification code must be matched
to a new tyre/wheel position after
rotating the tyres 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 tyre with a
road tyre containing the tyre pressure sensor.
The malfunction light w and the
warning message or code should go
off 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 or
purchase a relearn tool. There are
two minutes to match the first wheel
position, and five minutes overall tomatch 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.
3. On vehicles with manual transmission automated: Press
and hold brake pedal. Move and
hold the selector lever for five
seconds in position N until P is
displayed in the Driver Information Centre. P indicates
that the sensor matching process can be started.
On vehicles with manual
transmission: select neutral.
4. Use MENU on the turn signal
lever to select the Vehicle
Information Menu in the Driver
Information Centre.
5. Turn the adjuster wheel to scroll to
the tyre pressure menu.6. Press SET/CLR to begin the
sensor matching process. A
message requesting acceptance
of the process should be
displayed.
7. Press SET/CLR again to confirm
the selection. The horn sounds
twice to indicate that the receiver
is in relearn mode.
8. Start with the left side front wheel.
9. Place the relearn tool against the tyre sidewall, near the valve stem.Then press the button to activate
the tyre pressure sensor. A horn
chirp confirms that the sensor
identification code has been
matched to this wheel position.
10. Proceed to the right side front wheel, and repeat the procedure
in Step 9.
11. Proceed to the right side rear wheel, and repeat the procedure
in Step 9.
12. Proceed to the left side rear wheel, and repeat the procedure
in Step 9. The horn sounds twice
to indicate that the sensor
identification code has been
Page 157 of 197

Vehicle care155matched to the left side rear
wheel, and the tyre pressure
sensor matching process is no
longer active.
13. Turn off the ignition.
14. Set all four tyres to the recommended air pressure level
as indicated on the tyre
information label.
15. Ensure the tyre loading status is set according to the selected
pressure 3 73.
Tread depth
Check tread depth at regular
intervals.
Tyres should be replaced for safety
reasons at a tread depth of 2-3 mm
(4 mm for winter tyres).
For safety reasons it is recommended
that the tread depth of the tyres on
one axle should not vary by more than 2 mm.
The legally permissible minimum
tread depth (1.6 mm) has been
reached when the tread has worn
down as far as one of the tread wear
indicators (TWI). Their position is
indicated by markings on the
sidewall.
Tyres age, even if they are not used.
We recommend tyre replacement
every 6 years.
Changing tyre and wheel size
If tyres of a different size than those
fitted at the factory are used, it may be necessary to reprogramme the
speedometer as well as the nominal
tyre pressure and to make other
vehicle modifications.
After converting to a different tyre
size, have the label with tyre
pressures replaced.9 Warning
Use of unsuitable tyres or wheels
may lead to accidents and will
invalidate the vehicle type
approval.
Wheel covers
Wheel covers and tyres that are
factory approved for the respective
vehicle and comply with all of the
relevant wheel and tyre combination requirements must be used.
If the wheel covers and tyres used are
not factory approved, the tyres must
not have a rim protection ridge.
Wheel covers must not impair brake
cooling.