Tread Depth
Check tread depth at regular intervals.
For safety reasons, it is recommended
that the tread depth of the tyres on one
axle should not vary by more than 2 mm.
The legally permissible minimum tread
depth (1.6 mm) has been reached when
the tread has worn down as far as one
of the tread wear indicators (TWI). Their
position is indicated by markings on the
sidewall.
If there is more wear at the front than
the rear, swap round front wheels and
rear wheels periodically. Ensure that
the direction of rotation of the wheels
remains the same.
Tyres age, even if they are not used.
We recommend tyre replacement every 6
years.
Changing tyre and wheel size
If tyres of a different size than those
fitted at the factory are used, it may
be necessary to reprogramme the tyre
deflation detection system and make
other vehicle modifications. Have the
label with tyre pressures replaced.
Warning
The use of unsuitable tyres or wheels
may lead to accidents and will
invalidate the vehicle operating permit.
Wheel Covers
Wheel covers and tyres that are factory
approved for the respective vehicle and
comply with all of the relevant wheel and
tyre combination requirements must be
used.
If the wheel covers and tyres used are
not factory approved, the tyres must not
have a rim protection ridge.
Wheel covers must not impair brake
cooling.
Warning
Use of unsuitable tyres or wheel covers
could lead to sudden pressure loss and
thereby accidents.
Vehicles with steel wheels: When using
locking wheel nuts, do not attach wheel
covers.
Spare wheels: Do not use wheel covers.
Tyre Chains
Tyre chains are only permitted on the
front wheels.
Only use tyre chains designed to be used
with tyre type of the vehicle:
● For 16 inch and 17 inch tyres, only use
Polaire XP9 120 (9mm) tyre chains.
168
Maintenance and vehicle care
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