Page 140 of 197
138Vehicle care● See the Owner's manual forfurther information.
● Explosive gas may be present in the vicinity of the battery.
Wiper blade replacement
Lift the wiper arm. Press release lever
and detach the wiper blade.
Attach the 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. Push the wiper blade,
slightly angled to the wiper arm
downwards until it disengages.
Attach the wiper blade slightly angled
to the wiper arm and push until it
engages.
Lower wiper arm carefully.
Bulb replacement
Switch off the ignition and switch 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.
Replace headlight bulbs from within
the engine compartment.
Bulb check
After a bulb replacement switch on
the ignition, operate and check the
lights.
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 146 of 197
144Vehicle careInterior lightsCourtesy light, reading lights 1. To remove, prise the opposite side of the lamp switch using a
flat-blade screwdriver. (Be careful
not to make scratches.)
2. Remove the bulb.
3. Replace the bulb.
4. Reinstall the lamp assembly.
Load compartment light
1. Prise the lamp out with a screwdriver.
2. Remove bulb.
3. Insert new bulb.
4. Install lamp.
Instrument 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:
● In the front left of the engine compartment.
● On the driver's side behind a cover in the instrument panel.
Before replacing a fuse, turn off the
respective switch and the ignition.
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 150 of 197
148Vehicle careNo.Circuit1Onstar2Air conditioning system3Instrument panel4Transmission control module5Infotainment6Body control module7Rear parking assist8Data link connection9Electric steering column lock10Sensing and Diagnostic module11DC transformer12–13Electronic toll collection system14Linear power module15Central locking system/Ignition
system16Ignition systemNo.Circuit17forward collision alert18Instrument panel19Forward collision alert indication20Headlight range adjustment21Power windows, front22Power windows, rear23–24Manual transmission auto‐
mated module25Auxiliary power outlet26Sunroof27–28Body control module 829Body control module 730Body control module 631Body control module 532Body control module 4
Page 151 of 197
Vehicle care149No.Circuit33Body control module 334Body control module 235Body control module 1
–36Ignition system37Steering wheel control LED38–39Logistic/DC transformer40Power window, driver41Blower42Seat heating, front43Air conditioning module44Heated steering wheel45Body control module 2Vehicle tools
Tools
Vehicles with tyre repair kit
The vehicle tools are in the
compartment under the floor cover in
the load compartment, together with
the tyre repair kit.
Vehicles with spare wheel
The jack and the vehicle tools are in
the load compartment.
Page 153 of 197

Vehicle care151Tyre pressure 3 182.
The tyre pressure information label
on the driver's door frame indicates the original equipment tyres and the
correspondent tyre pressures.
The tyre pressure data refers to cold
tyres. It applies to summer and winter
tyres.
The ECO tyre pressure serves to
achieve the smallest amount of fuel
consumption possible.
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:
● Identify the engine identifier code. Engine data 3 177.
● Identify the respective tyre.
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.
If the tyre pressure must be reduced
or increased, switch off ignition. After
adjusting tyre pressure switch on
ignition and select the relevant setting on the page Tyre Load in the Driver
Information Centre 3 73.
Temperature dependency
The 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
1.5 psi for a 10 °C temperature
increase. This must be considered
when warm tyres are checked.
The tyre pressure value displayed in
the Driver Information Centre shows
the real tyre pressure. A cooled down tyre will show a decreased value,
which does not indicate an air leak.
Tyre pressure monitoringsystem
The tyre pressure monitoring system
checks the pressure of all four tyres
once a minute when vehicle speed
exceeds a certain limit.
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.