Page 172 of 217
170Vehicle care
Fuse box version BNo.Circuit1Front power windows2-3Instruments4Heating, air conditioning
system, electronic climate
control5Airbags6–7–8–9–10–11Heated rear window12Rear window wiper13Parking assist14Heating, air conditioning system15–No.Circuit16Open&Start system17Rain sensor, air quality sensor,
tyre pressure monitoring
system, interior mirror18Instruments, switches19–20CDC21Heated exterior mirrors22–23Rear power windows24Diagnostics plug25–26Electrical foldable exterior
mirrors27Ultrasonic sensor, anti-theft
alarm system28–
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174Vehicle care
Remove the valve cap key from the
fuel filler flap and use it to unscrew the
valve cap.
On vehicles with tyre pressure
monitoring system, screw the adapter
to the valve.
Tyre pressure 3 205 and on the label
on the inside of the fuel filler flap.
The tyre pressure data refer to cold
tyres. It applies to summer and winter tyres.
Always inflate the spare wheel to the
pressure specified for full load.
The ECO tyre pressure serves to
achieve the smallest amount of fuel
consumption possible. It must not be used with run-flat tyres.
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 drive axle and body style.
2. Identify the engine identifier code.
Engine data 3 200.
3. Identify the respective tyre.The tyre pressure tables show all
possible tyre combinations 3 205.
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.
Tyre pressure monitoring
system
The tyre pressure monitoring system
continually checks the pressure of all
four wheels when vehicle speed
exceeds a certain limit.
All wheels must be equipped with
pressure sensors and the tyres must
have the prescribed pressure.
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Vehicle care175
Otherwise, the tyre pressure will be
monitored by the deflation detection
system 3 175.
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 current tyre pressures can be
shown in the Info-Display 3 106.
Vehicle messages, tyre pressure
3 101.
Control indicator w 3 90.
If a complete set of wheels without
sensors is mounted (e.g. four winter
tyres), no error message will be
displayed. The tyre pressure
monitoring system is not operational.
Retrofitting of sensors is possible.
The use of commercially available
liquid tyre repair kits can impair the
function of the system. Factory-
approved repair kits can be used.
External high-power radio equipment
could disrupt the tyre pressure
monitoring system.System initialisation
After a wheel change, the system
must be initialised: inflate the tyres to
the prescribed pressure, switch on
the ignition, then press and hold the
DDS button for approx. 4 seconds;
control indicator w flashes three
times.
Tyre deflation detection
system
The tyre deflation detection system
continually checks the rotation speed
of all four tyres.
If a tyre loses pressure the control
indicator w illuminates red. Stop
immediately and check tyre pressure.
Control indicator w 3 90.
System initialisation
After tyre pressure correction or
wheel change, the system must be
initialised: Switch on the ignition,
press and hold the DDS button for
approx. 4 seconds, control indicator
w flashes three times.
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