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Tyre inflation pressure-control system*
The tyre inflation pressure-control system compares with the aid of the ABS sensors
the speed and also the rolling circumference of the individual wheels. If the rolling
circumference of a wheel is changed, the warning light
ment cluster ⇒ page 38 and an audible signal sounds. The rolling circumference of
the tyre can change if:
the tyre inflation pressure is too low,
the structure of the tyre is damaged,
the vehicle is loaded on one side,
the wheels of an axle are loaded heavily (e.g. when towing a trailer or when
driving uphill or downhill),
snow chains are mounted,
the temporary spare wheel is mounted,
one wheel per axle was changed.
Basic setting of tyre inflation pressure-control system
After changing the tyre inflation pressures or after changing one or several wheels,
a basic setting of the system must be carried out as follows.
Inflate all tyres to the specified inflation pressure ⇒ page 238.
Switch on the ignition.
Using the system
Safety
Fig. 198 Button for setting
the tyre inflation pressure
control value
lights up in the instru-
Driving Tips
General Maintenance
⇒ fig. 198
Press button
for more than 2 seconds. While pressing the
button, the warning light
lights up. At the same time the memory of the system
is erased and the new calibration is started, which is confirmed with an audible
signal and then the warning light
If the warning light
does not go out after the basic setting, there is a fault in
the system. Have the vehicle inspected by your nearest specialist garage.
Warning light
lights up
If the tyre inflation pressure of at least one wheel is insufficiently inflated in compar-
ison to the stored basic value, the warning light
Warning light
flashes
If the warning light flashes, there is a system fault. Have the vehicle inspected by
your nearest specialist garage.
WARNING
When the warning light
lights up, immediately reduce the speed and
avoid sudden steering and brake manoeuvres. Please stop the vehicle
without delay at the nearest possible stop and inspect the tyres and their
inflation pressures.
The driver is responsible for the correct tyre inflation pressures. For this
reason, the tyre inflation pressures must be checked regularly.
Under certain circumstances (e.g. sporty style of driving, wintry or
unpaved roads) the warning light
all.
The tyre inflation pressure-control system does not take away the
responsability from the driver for the correct tyre inflation pressure.
Note
The tyre inflation pressure-control system:
does not replace the regular tyre inflation pressure control, because the system
cannot detect an even pressure loss,
Breakdown assistance
Intelligent Technology
goes out.
⇒
lights up.
can be delayed or does not light up at
Technical Data
199
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