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Practical tips
●
Tyre pr
essures which are too high or too
low reduce the useful life of the tyre, affect-
ing vehicle performance.
●
If a tyre has not been punctured and it
does not have to be changed immediately,
drive to the nearest specialised workshop
at a moderate speed and have the tyre
checked and inflated to the correct pres-
sure.
WARNING
Observe the safety warnings
›
››
in Con-
trol and warning l
amps on page 123.
Note
●
If excessiv
ely low tyre pressure is detec-
ted with the ignition on, an audible warning
will sound. In the event that there is a fault
in the system, an audible warning will
sound.
●
Driving on dirt tracks for a long period of
time or driving in a sporty style can tempo-
rarily deactivate the TPMS. The control
lamp shows a fault, but disappears when
road conditions or the driving style change.
Operation
Fig. 315
Instrument panel: warning of loss of
t
yr
e pr
essure.
Fig. 316
Glove compartment: tyre control
s
wit
ch.
The tyre monitor indicator compares wheel
r
e
v
olutions and, with this information, the
tread of each wheel using the ABS sensors. If
the rolling circumference of one or more
wheels has changed, the tyre monitoring indi-
cator will indicate this on the instrument pan-
el through a warning lamp and a warning to
the driver
›››
Fig. 315. When only one specific
tyre is affected, its position within the vehicle
will be indicated.
Loss of pressure: Check left
tyre pressure!
Wheel tread change
The wheel tread changes when:
●
Tyre pressure is manually changed
●
Tyre pressure is insufficient
●
Tyre structure is damaged
●
The vehicle is unbalanced because of a
load
●
The wheels on an axle are subject to a
heavier load (e.g. with a heavy load).
●
The vehicle is fitted with snow chains
●
The temporary spare wheel is fitted
●
The wheel on one axle is changed
There may be a delay in the reaction of the
tyre monitoring indicator or it may not indi-
cate anything under certain circumstances
(e.g. sporty driving, snow-covered or un-
paved roads, or when driving with snow
chains).
Calibrating the tyre monitoring indicator
After changing the tyre pressure or replacing
one or more wheels, the tyre monitoring
338
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