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302 Wheels and tyres
The correct tyre pressures for tyres fitted at the factory is shown on a label
and is valid for summer and winter tyres. This label ⇒ Fig. 179 is either in
the driver door strut or inside the fuel cap.
Under-inflation or over-inflation will reduce the life of the tyres considerably
and also impair the car's handling ⇒
. It is essential to maintain the cor-
rect tyre pressures, especially if driving at high speeds. Incorrect tyre pres-
sure causes premature wear and could cause tyre blow-out.
The pressure should therefore be checked at least once a month and before
starting a journey.
As a general rule, the pressures given are for cold tyres. When the tyres are
hot, the pressures are greater.
Never deflate a hot tyre in order to obtain the required pressure. This could
result in very low tyre pressures which may lead to sudden blow-outs.
Checking tyre pressures
Tyre pressures should only be checked when the vehicle has not been driv-
en for more than a few kilometres (miles) at low speeds in the past three
hours.
● The tyre pressures should be checked regularly, and only when the tyres
are cold. Always check all the tyres. Tyre pressures should be checked more
often in colder regions, and only when the vehicle has not been driven re-
cently. Always use a correctly-operating tyre gauge.
● Adjust tyre pressures to the loads carried in the vehicle.
● After checking the pressure, always replace the valve caps, and where
applicable, observe the instructions given for adjusting the tyre control sys-
tem ⇒ page 225.
WARNING
If tyre pressures are too high or too low, the tyre may deflate or burst
suddenly while driving. This could result in a serious accident.
● If the tyre pressure is too low, the tyres could overheat, resulting in
tread detachment or even burst tyres.
● When driving at high speeds and/or fully loaded, the tyre could sud-
denly overheat, burst or be subject to tread detachment, with the resul-
tant loss of control of the vehicle.
● Tyre pressures which are too high or too low reduce the service life of
the tyre, affecting the vehicle's performance.
● Tyre pressures should be checked regularly, at least once a month
and before long journeys.
● Adjust the pressures of all the tyres to the vehicle load.
● Never deflate excess pressure from hot tyres.
CAUTION
● Take care not to tilt the manometer when placing it on the valve. Other-
wise, the valve may be damaged.
● To avoid damage to the valves, always replace valve caps correctly.
Check that the caps are identical to the standard caps and have been cor-
rectly tightened.
For the sake of the environment
Under-inflated tyres will increase the fuel consumption.
Note
When checking tyre pressures, please observe the instructions for the tyre
control system ⇒ page 225.
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