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09 Wheels and tyres
09
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* Option/accessory, for more information, see Introduction.
329
Tyre pressure monitoring (TM)*
30
The TM (Tyre Monitor) system senses tyre
rotation speed in order to determine whether
the tyres have the correct tyre pressure. If the
pressure is too low, the tyre's diameter is
changed and, as a result, so is the rotation
speed. By comparing the tyres with each
other the system can determine whether one
or more tyres have pressure that is too low.
Messages
If the tyre pressure is too low then a warning
lamp (
) illuminates in the combined instru-
ment panel and one of the following mes-
sages is shown:
•
Tyre pressure low Check front right
tyre
•
Tyre pressure low Check front left
tyre
•
Tyre pressure low Check rear right
tyre
•
Tyre pressure low Check rear left tyre
•
Tyre pressure low Check tyres
•
Tyre pressure system Service
required
IMPORTANT
If a fault occurs in the TM system the
warning lamp
in the combined instru-
ment panel will flash for approx. 1 minute
and then illuminate with a constant glow. A
message is also shown in the combined
instrument panel.
The system does not replace normal tyre
maintenance.
TM recalibration
In order for TM to work correctly, a reference
value for the tyre pressure must be deter-
mined. This must be performed each time the
tyres are changed or the tyre pressure is
changed.
Recalibration
Settings are made using the centre console's
controls, see MY CAR (p. 108).
1. Switch off the ignition.
2. Inflate the tyres to the desired pressure in
accordance with the tyre pressure label
on the driver's side door pillar (between
front and rear doors) and select key posi-
tion II, see Key positions (p. 75).
3. Select the menu system MY CAR to open
the menus for tyre pressure.
4.
Select
Calibrate tyre pressure and
press OK.
5. Start and drive the car.
> Recalibration is carried out while the
car is being driven and can be inter-
rupted at any time. If the engine is
switched off while recalibration is in
progress then it is resumed when the
car is driven again.
TM is then recalibrated and the new reference
value applies until steps 1-5 are carried out
again.
NOTE
Remember that the TM system must be
recalibrated at each tyre change or if the
tyre pressure is changed. If new reference
values are not stored then the system can-
not function properly.
NOTE
•
After a tyre has been inflated, always
refit the dust cap in order to avoid
damage to the valve from gravel, dirt,
etc.
•
Only use plastic dust caps. Metal dust
caps can rust and become difficult to
unscrew.
30
Standard in certain markets.
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