Mercedes-Benz G 550 2015, Operator'S Manual

Page: 233 / 274

Regular checking of wheels and tires
G WARNING
Damaged tires can cause tire inflation pres-
sure loss. As a result, you could lose control of
your vehicle. There is a risk of accident.
Check the tires regularly for signs of damage
and replace any damaged tires immediately.
R
Regularly check the wheels and tires of
your vehicle for damage at least once a
month, as well as after driving off-road or
on rough roads. Damage includes bulges
and deformation on tires, cuts, punctures,
cracks or severe corrosion on wheels, for
example. Damaged wheels can cause a
loss of tire pressure.
R
Regularly check the tire tread depth and
the condition of the tread across the whole
width of the tire (
Y
page 231). In order to
inspect the inner side of the tire surface,
turn the steering wheel to full lock.
R
All wheels must have a valve cap to protect
the valve against dirt and moisture. Do not
install anything onto the valve other than
the standard valve cap or a valve cap
approved by Mercedes-Benz for your vehi-
cle.
Do not install anything onto the valve, such
as tire pressure monitoring systems.
R
You should regularly check the pressure of
all your tires including the spare wheel, par-
ticularly prior to long trips. Adjust the tire
pressure as necessary (
Y
page 237).
The service life of tires depends, among other
things, on the following factors:
R
Driving style
R
Tire pressure
R
Distance covered
Tire tread
G WARNING
Insufficient tire tread will reduce tire traction.
The tire is no longer able to dissipate water.
This means that on wet road surfaces, the risk
of hydroplaning increases, in particular where
speed is not adapted to suit the driving con-
ditions. There is a risk of accident.
If the tire pressure is too high or too low, tires
may exhibit different levels of wear at differ-
ent locations on the tire tread. Thus, you
should regularly check the tread depth and
the condition of the tread across the entire
width of all tires.
Minimum tire tread depth for:
R
Summer tires:
â
in (3 mm)
R
M+S tires:
ã
in (4 mm)
For safety reasons, replace the tires before
the legally prescribed limit for the minimum
tire tread depth is reached.
Marking
:
shows the tread wear indicator
(TWI). The arrow indicates the placement of
the tire tread.
Do not drive with tires which have too little
tread depth. tire traction on wet road surfaces
decreases significantly when the tread depth
is less than 1 /
8
in (3 mm).
Treadwear indicators (TWI) are required by
law. Six indicators are positioned over the tire
tread. They are visible once the tread depth is
approximately 1 /
16
in (1.6 mm). If this is the
case, the tire is so worn that it must be
replaced.
The recommended tread depth for summer
tires is at least 1 /
8
in (3 mm). The recommen-
ded tread depth for winter tires is at least
1
/
6
in (4 mm).
Operation
231
Whe
el
s
and
tires
Z