Notes on noise or unusual handling charac‐
teristics
Make sure there are no vibrations, noises or
unusual handling characteristics when the vehi‐
cle is in motion. This may indicate that the
wheels or tires are damaged. Hidden tire dam‐
age could also be causing the unusual handling
characteristics.
If you suspect that a tire is malfunctioning,
reduce your speed immediately and have the
tires and wheels checked at a qualified specialist
workshop.
Notes on regularly inspecting wheels and
tires
&
WARNING Risk of injury through dam‐
aged tires
Damaged tires can cause tire pressure loss.
#
Check the tires regularly for signs of
damage and replace any damaged tires
immediately.
&
WARNING Risk of hydroplaning due to
insufficient tire tread
Insufficient tire tread will result in reduced
tire grip.
In heavy rain or slush the risk of hydroplaning
is increased, in particular where speed is not
adapted to suit the conditions.
#
Thus, you should regularly check the
tread depth and the condition of the
tread across the entire width of all tires.
Minimum tread depth for:
R
Summer tires: â in (3 mm)
R
M+S tires: ãin (4 mm)
#
For safety reasons, replace the tires
before the legally-prescribed limit for
the minimum tread depth is reached.
Carry out the following checks on all wheels reg‐
ularly, at least once a month or as required, for
example, prior to a long journey or driving off-
road:
R
Check the tire pressure (/ page 306).
R
Visually inspect wheels and tires for damage.
R
Check the valve caps.
R
Visual check of the tire tread depth and the
tire contact surface across the entire width.
The minimum tread depth for summer tires is
â in (3 mm) and for winter tires ã in
(4 mm).
Six marks 1 show where the bar indicators
(arrow) are integrated into the tire tread. They
are visible once a tread depth of approximately
á in (1.6 mm) has been reached.
Wheels and tires
305
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