Tyres with directional tread pattern
Tyres with directional tread pattern have been
designed to operate best when rotating in only
one direction. An arrow on the tyre sidewall in-
dicates the rotation direction on tyres with di-
rectional tread. Always observe the indicated
rotation direction in order to guarantee opti-
mum grip and help avoid aquaplaning, exces-
sive noise and wear.
If the tyre is mounted in the opposite rotation
direction, drive with extreme caution, as the tyre
is no longer being used correctly. This is of
particular importance when the road surface
is wet. Change the tyre as soon as possible or
remount it with the correct rotation direction.
Works after changing a wheel
●
Replace the hub caps or wheel nut caps (de-
pending on equipment).
●
Return all tools to their proper storage loca-
tion.
●
If the replaced wheel does not fit in the spare
wheel housing, store it safely in the luggage
compartment ›››page294.
●
Check the tyre pressure of the newly moun-
ted tyre as soon as possible.
●
In vehicles fitted with a tyre pressure indicator,
adjust the pressure and store it in the memory
›››page372.
●
Have the tightening torque of the wheel nuts
checked as soon as possible with a torque
wrench ›››page371. Meanwhile, drive care-
fully.
●
Have the flat tyre replaced as quickly as pos-
sible.
Tyre pressure monitor sys-
tem
Tyre pressure monitor indicator
Fig.250 Instrument cluster: warning of loss of
tyre pressure.
The tyre pressure monitoring system compares
the individual speeds of each wheel and thus
the dynamic radius with the help of the ABS
sensors.
If the rolling circumference of one or more
wheels has changed, the tyre pressure monitor-
ing indicator will indicate this on the instrument
panel through a warning lamp and a warning to
the driver ›››Fig.250. If only one tyre is aec-
ted, its position on the vehicle will be indicated.
Loss of pressure: Check left tyre pressure!
Change in wheel diameter
The wheel diameter changes when:
●
Tyre pressure is changed manually.
●
The tyre pressure is insucient.
●
The tyre's structure is damaged.
●
The vehicle is not level due to a load.
●
The wheels on an axle are subject to a heav-
ier load (e.g. with a heavy load).
●
The vehicle is fitted with snow chains.
●
The temporary spare wheel has been fitted.
●
One wheel has been changed on an axle.
There may be a delay in the reaction of the tyre
pressure monitoring indicator or it may not
indicate anything under certain circumstances
(e.g. sporty driving, snow-covered or unpaved
roads, or when driving with snow chains).
Calibrate the tyre pressure monitoring indi-
cator
After changing the tyre pressure or replacing
one or more wheels, the tyre pressure monitor-
ing indicator must be recalibrated. This should
also be done, for example, when switching the
front and rear tyres.
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