Tread Depth - Opel ZAFIRA TOURER Owner's Manual

246 Vehicle care
Control indicator w 3 114.
Vehicle messages 3 122.
If the tyre pressure shall be reduced
or increased, switch off ignition.
If a complete set of wheels without
sensors is mounted (e.g. four winter
tyres), a message is displayed in the
Driver Information Centre. The tyre
pressure monitoring system is not
operational. Retrofitting of sensors is
possible.
A spare wheel or temporary spare
wheel is not equipped with pressure
sensors. The tyre pressure
monitoring system is not operational
for these wheels. Control indicator w
illuminates. For the further three
wheels the system remains
operational.
The use of commercially available
liquid tyre repair kits can impair the
function of the system. Factory
approved repair kits can be used.
External high-power radio equipment
could disrupt the tyre pressure
monitoring system.
The tyre pressure monitoring system
valve cores and sealing rings must be
replaced each time the tyres are
changed.
Adaptive threshold function
The tyre pressure monitoring system
automatically detects if the vehicle is
driven with a tyre pressure
appropriate for a load of up to 3
people or for a full load.
If the tyre pressure shall be reduced,
switch off ignition before reducing.
Auto learn function
After changing wheels the vehicle has
to be stationary for approx.
20 minutes, before the system
recalculates. The following relearn
process takes up to 10 minutes of
driving with a minimum speed of
20 km/h. In this case $ can be
displayed or pressure values can
swap in the Driver Information Centre.
If problems occur during the relearn
process a warning message is
displayed in the Driver Information
Centre.
Temperature compensation
Cold tyres decrease the tyre
pressure, warm tyres increase the
tyre pressure. The tyre pressure
monitoring system considers this
effect for the warning messages.
The tyre pressure value displayed in
the Driver Information Centre shows
the actual tyre pressure. Therefore it
is important to check tyre pressure
with cold tyres.

Tread depth

Check tread depth at regular
intervals.
Tyres should be replaced for safety
reasons at a tread depth of 2-3 mm
(4 mm for winter tyres).
For safety reasons, it is
recommended that the tread depth of
the tyres on one axle should not vary
by more than 2 mm.