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Hubcaps
First read and observe the introductory information and safety warn-
ings
on page 169.
Pulling off
›
Carefully remove the wheel trim cap using the wire clamp from the vehicle tool
kit
» Fig.
139.
Tyre pressure monitor
First read and observe the introductory information and safety warn-
ings
on page 169.
The tyre control display compares the speed and thus the rolling circumference of
the individual wheels with the help of the ABS sensors. If the rolling circumfer-
ence of a wheel is changed, the warning light
ter
» page
23,
Tyre pressure and an audible signal sounds.
174
General Maintenance
Fig. 139
Pull off the wheel trim cap on
light alloy wheels
Fig. 140
Button for setting the tyre infla-
tion pressure control value
in the instrument clus-
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 the system
After changing the tyre inflation pressure, after changing one or several wheels,
the position of a wheel on the vehicle (e.g. exchanging the wheels between the
axles) or when the warning light lights up while driving, a basic setting of the sys-
tem must be carried out as follows:
›
Inflate all of the tyres to the specified inflation pressure
of tyres.
›
Switch on the ignition.
›
Press and hold the symbol key
pressing the button, the warning light
tem memory 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, this indicates a
system fault. Seek help from a specialist garage.
The warning light
is lit
If the tyre inflation pressure of at least one wheel is insufficiently inflated in com-
parison to the stored basic value, the warning light
The warning light
flashes
If the warning light flashes, there is a system fault. Seek help from a specialist ga-
rage to correct the fault.
WARNING
When the warning light
■
avoid sudden steering and brake manoeuvres. Stop the vehicle as soon as
possible and inspect the tyres and their inflation pressure.
Under certain circumstances (e.g. a racy style of driving, wintry or unpaved
■
roads), the warning light
may be delayed or does not light up at all.
» page
» Fig. 140
for longer than 2 seconds. While
illuminates. At the same time the sys-
goes out.
»
lights up.
illuminates, immediately reduce the speed and
170, Service life
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