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358
Wheels and tyres
When driving, the system self-calibrates the
t
yre pressure provided by the driver and the
wheels fitted. After a long journey with varied
speeds the programmed values are collected
and monitored.
With the wheels under very heavy loads, the
tyre pressure must be increased to the total
recommended tyre pressure before the calibra-
tion ›››Fig.244.
WARNING
When the tyres are inflat
ed at dierent pres-
sures or at a pressure that is too low then a
tyre may be damaged resulting in a loss of
control of the vehicle and a serious or fatal
accident.
●
If the lamp
lights up, reduce speed im-
mediat
ely and avoid any sudden turning or
braking manoeuvres. Stop when possible,
and check the tyre pressure and status.
●
The tyre pressure monitoring system can
only operate correctly if all of the tyres are
inflated to the correct pressure when cold.
●
If a tyre has not been punctured and it does
not have to be changed immediately, drive to
the nearest specialised workshop at a mod-
erate speed and have the tyre checked and
inflated to the correct pressure.
Note
●
Driving for the first time with ne
w tyres at
a high speed can cause them to slightly ex-
pand, which could then produce an air pres-
sure warning.
●
If excessively low tyre pressure is detected
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 unpaved roads for a long pe-
riod of time, or sporty driving, may tempora-
rily deactivate the system. The control lamp
shows a fault, but disappears when road
conditions or the driving style change.
●
Do not only rely on the tyre pressure moni-
toring system. Regularly check your tyres to
ensure that the tyre pressure is correct and
that the tyres are not damaged due to punc-
ture, cuts, tears and impacts/dents. Remove
objects from the tyres only when they have
not pierced the tyres.
●
The tyre pressure monitoring indicator
does not function when there is a fault in the
ESC or ABS ›››page172.
Troubleshooting
Low tyre pressure
The contr
ol lamp switches on yellow.
The inflation pr
essure of one or more wheels is
much lower than the value set by the driver, or
the tyre has structural damage. In addition, a
audible warning sounds and a text message is
displayed on the instrument panel screen.
●
Stop the vehicle! St
op the vehicle safely
as soon as possible.
●
Check all tyres and pressures.
●
Replace any damaged tyres.
Fault in the tyre pressure loss indicator
The contr
ol lamp flashes for approximately 1
minute and then lights up permanently in yel-
low.
●
If the tyre is inflat
ed correctly, switch the igni-
tion o and on again.
●
Re-calibrate the tyre pressure monitoring sys-
tem ›››page357
●
If the fault continues, go to a specialised
workshop.
Tyre repair
TMS (Tyre Mobility System) puncture
repair kit
The puncture repair kit (Tyre Mobility System)
will reliably seal punctures caused by the pen-
etration of a foreign body of up to about 4 mm
in diameter. Do not remove foreign objects,
e.g. screws or nails, from the tyre.
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