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Vehicle care159Electrical system
Fuses Data on the replacement fuse must
match the data on the defective fuse.
Before replacing a fuse, turn off the
respective switch and the ignition.
There are different types of fuses in
the 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.
It is advisable to carry a full set of
fuses. Provision is made in the fuse
box for the storing of spare fuses.
Some functions are protected by
several fuses.
Fuses may also be inserted without existence of a function.
Notice
Not all fuse box descriptions in this
Owner's Manual may apply to your
vehicle. Refer to the fuse box label,
where fitted.
Fuse extractor
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160Vehicle care
A fuse extractor may be located on
the instrument panel fuse box cover.
Place the fuse extractor on the
various types of fuse from the top or
side, and withdraw fuse.
Instrument panel fuse box
The fuse box is located on the left-
hand side of the instrument panel, behind a trim panel.
Pull upper part of trim panel and
remove to access the fuse box.
Do not store any objects behind this
panel.
Some circuits may be protected by
several fuses.
Page 163 of 211
Page 164 of 211

162Vehicle careNo.Circuit1Adblue injection battery2Vehicle battery (with electronic
key system)3APC battery backup (with elec‐
tronic key system)4Heating and ventilation system5Adaptations6Adaptations7Heating and ventilation system8Additional heating and ventila‐
tion / air conditioning system9Supplementary heating and
ventilation system10Electric exterior mirrors / addi‐
tional adaptations11Heated exterior mirrors12Radio / multimedia / electric
exterior mirrors / diagnostic
socket13Multimedia / trailer hitchNo.Circuit14Courtesy lights / battery
discharge protection15Fuel injection system / tyre pres‐ sure monitoring system / elec‐
tronic key system16Hazard warning flashers / turn
and lane-change signals17Central locking18Left-hand high beam / right-
hand low beam / tail lights / left- hand daytime running light19Front fog lights / rear fog lights /
number plate lighting20Alarm / horn / lighting / wiper21Instrument cluster22Light switch23Rear window wiper / wind‐
screen washer pump / horn24APC general battery25Reversing lightsNo.Circuit26Brake switch27Fuel injection / starter28Airbag / steering column lock29Passenger power window30Power steering31Brake lights32APC battery backup (with elec‐
tronic key system)33Service display34Cigarette lighter / power outlet35Right-hand high beam / left-
hand low beam / sidelights /
right-hand daytime running light36Brake lights / ABS / immobiliser37Interior lighting / air conditioning38Starting with electronic key
system39Rear window wiper40Warning chimes
Page 165 of 211
Vehicle care163No.Circuit41Load compartment power outlet42Driver power window43Rear power outlet44Starting / body control module45Heated seats46Heating / air conditioning47Windscreen wiper48Tachograph
After having changed defective fuses,
replace the trim panel.
Vehicle tools
Tools
The jack, wheel wrench, wheel bolt
sleeve, torx key, adapters, wheel
cover hook, towing eye are contained
in a unit, stowed under the driver's
seat.
Slide seat forwards and fold the
backrest forwards 3 44 to access the
tool box. The tool box may be secured
in position with a wing nut.
Wheel changing 3 171, Spare wheel
3 173.
Vehicles with tyre repair kit: The
wheel cover hook and torx key are
stored within the tyre repair kit case,
stowed under the driver's seat.
Tyre repair kit 3 169.
Page 166 of 211

164Vehicle careWheels and tyres
Tyre condition, wheel condition Drive over edges slowly and at right
angles if possible. Driving over sharp
edges can cause tyre and wheel
damage. Do not trap tyres on the kerb when parking.
Regularly check the wheels for
damage. Seek the assistance of a
workshop in the event of damage or
unusual wear.
We recommend not swapping the
front wheels with the rear wheels and
vice versa, as this can affect vehicle
stability. Always use less worn tyres
on the rear axle.
Tyres
Factory-fitted tyres are matched to
the chassis and offer optimum driving comfort and safety.Winter tyres
Winter tyres improve driving safety at temperatures below 7 °C and should
therefore be fitted on all wheels.
In accordance with country-specific
regulations, a notice indicating the
maximum permissible speed for the
tyres must be affixed within the
driver's field of vision.
Tyre designations
E.g. 195/65 R 16 C 88 Q195:Tyre width, mm65:Cross-section ratio (tyre height
to tyre width), %R:Belt type: RadialRF:Type: RunFlat16:Wheel diameter, inchesC:Cargo or commercial use88:Load index e.g. 88 is
equivalent to 567 kgQ:Speed code letter
Speed code letter:
Q:up to 100 mphS:up to 112 mphT:up to 118 mphH:up to 130 mphV:up to 150 mphW:up to 168 mph
Choose a tyre appropriate for the
maximum speed of your vehicle.
The maximum speed is achievable at kerb weight with driver (75 kg) plus
125 kg payload. Optional equipment
could reduce the maximum speed of
the vehicle.
Directional tyres
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.
Tyre pressure
Check the pressure of cold tyres at
least every 14 days and before any
long journey. Do not forget the spare
wheel. This also applies to vehicles
with tyre pressure monitoring system.
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Vehicle care165
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 3 198.
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 3 187.
2. Identify the respective tyre.
The tyre pressure tables show all
possible tyre combinations 3 198.
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 1.5 psi for a
10 °C temperature increase. This
must be considered when warm tyres
are checked.
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166Vehicle careTyre pressure monitoring
system
The Tyre Pressure Monitoring
System (TPMS) uses radio and
sensor technology to check tyre
pressure levels.Caution
Tyre pressure monitoring system
warns only about low tyre pressure condition and does not replace
regular tyre maintenance by the
driver.
All wheels must be equipped with pressure sensors and the tyres must
have the prescribed pressure.
Notice
In countries where the tyre pressure
monitoring system is legally
required, the use of wheels without
pressure sensors will invalidate the
vehicle type approval.
The TPMS sensors monitor the air
pressure in the tyres and transmit tyre pressure readings to a receiver
located in the vehicle.
Tyre pressure chart 3 198.
Low tyre pressure condition
A detected low tyre pressure
condition is indicated by illumination
of control indicator w 3 88 and a
corresponding message appears in
the DIC.
If w illuminates, stop as soon as
possible and inflate the tyres as
recommended 3 198.
After inflating, some driving may be
required to update the tyre pressure
values in the system. 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 of all
four tyres.
If the tyre pressure must be reduced
or increased, switch off ignition.
Only mount wheels with pressure
sensors, otherwise w flashes for
several seconds then illuminates
continuously together with control
indicator F 3 86 and a corresponding
message appears in the DIC.
A spare wheel or temporary spare
wheel is not equipped with pressure
sensors. TPMS is not operational for
these wheels. For the further three
wheels, TPMS 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 (DIC) 3 90.
Vehicle messages 3 91.