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70 Cockpit
Tyre pressure*
Fig. 40 Centre console:
tyre monitor system but-
ton
The tyre warning lamp
1)
compares wheel revolutions and with this informa-
tion, the diameter of each wheel using the ESP sensors. If the diameter of a
wheel changes, the tyre warning lamp lights up. The wheel diameter
changes when:
● Tyre pressure is insufficient.
● The tyre structure is damaged.
● The vehicle is unbalanced because of a load.
● The wheels of one axle are under more pressure (for example, driving
with a trailer or on extreme slopes).
● The vehicle is fitted with snow chains.
● The temporary spare wheel is fitted.
● The wheel on one axle is changed.
Tyre pressure adjustment
Following the modification to tyre pressure or changing one or more wheels,
the button ⇒ fig. 40 must be kept pressed while the ignition is on until an
acoustic signal is heard.
If the wheels are under excessive load (for example, driving with a trailer or
heavy load), the tyre pressure must be increased to the recommended value
for a full load (see the sticker on the inside of the fuel flap). If the tyre moni-
tor system button is pressed down, the new tyre pressures are confirmed.
The tyre pressure warning lamp lights up
If the tyre pressure of a wheel is much lower than the value set by the driver,
then the tyre pressure warning lamp ⇒
will light up.
WARNING
● When the tyre pressure warning lamp lights up, reduce speed imme-
diately and avoid any sudden manoeuvre or braking. Stop when possible,
and check the tyre pressure and status.
● The driver is responsible for maintaining correct tyre pressures. For
this reason, tyre pressure must be regularly checked.
● Under certain circumstances (for example, when driving in a sports-
like manner, in winter conditions or on a dirt track) the tyre warning lamp
may light up or function incorrectly.
Note
If the battery is disconnected, the yellow warning lamp lights up after
turning the ignition on. This should turn off after a brief journey.
1)
Depending on the model version
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