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324 Wheels and tires
Notes on noise or unusual handling characteris-
tics
Make sure there are no vibrations, noises or
unusual handling characteristics when the vehicle
is in motion. This may indicate that the wheels or
tires are damaged. Hidden tire damage could also
be causing the unusual handling characteristics.
If you suspect that a tire is defective, 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 damaged
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:
Summer tires: â in (3 mm)
R
M+S tires: ãin (4 mm)
R
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 regu-
larly, at least once a month or as required, for
example, prior to a long journey or driving off-
road:
Check the tire pressure (
page 325).
/
R
Visually inspect wheels and tires for damage.
R
Check the valve caps.
R
Visually inspect the tire tread depth and the
R
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 tire tread depth of approximately
á in (1.6 mm) has been reached.
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