Wet Road Surface - Mercedes-Benz 2015 GLK Operator's Manual

tics, e.g. pulling to one side. This may indi-
cate that the wheels or tires are damaged.
If you suspect that a tire is defective,
reduce your speed immediately. Stop the
vehicle as soon as possible to check the
wheels and tires for damage. Hidden tire
damage could also be causing the unusual
handling characteristics. If you find no
signs of damage, have the tires and wheels
checked at a qualified specialist workshop.
When parking your vehicle, make sure that
R
the tires do not get deformed by the curb or
other obstacles. If it is necessary to drive
over curbs, speed humps or similar eleva-
tions, try to do so slowly and at an obtuse
angle. Otherwise, the tires, particularly the
sidewalls, may be damaged.
Regular checking of wheels and tires
WARNING
G
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.
Regularly check the wheels and tires of
R
your vehicle for damage at least once a
month, as well as after driving off-road or
on rough roads. Damaged wheels can
cause a loss of tire pressure. Pay particular
attention to damage such as:
cuts in the tires
-
punctures
-
tears in the tires
-
bulges on tires
-
deformation or severe corrosion on
-
wheels
Regularly check the tire tread depth and
R
the condition of the tread across the whole
width of the tire (
Y
turn the front wheels to full lock in order to
inspect the inner side of the tire surface.
page 333). If necessary,
All wheels must have a valve cap to protect
R
the valve against dirt and moisture. Do not
mount anything onto the valve other than
the standard valve cap or other valve caps
approved by Mercedes-Benz for your vehi-
cle. Do not use any other valve caps or sys-
tems, e.g. tire pressure monitoring sys-
tems.
Regularly check the pressure of all the tires
R
including the emergency spare wheel or the
spare wheel, particularly prior to long trips,
and correct the pressure as necessary
( page 336).
Y
Observe the notes on the emergency spare
wheel ( page 366).
Y
The service life of tires depends, among other
things, on the following factors:
Driving style
R
Tire pressure
R
Distance covered
R
Important safety notes on the 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:
Summer tires: â in (3 mm)
R
M+S tires: ã in (4 mm)
R
For safety reasons, replace the tires before
the legally prescribed limit for the minimum
tire tread depth is reached.
Operation
333
Z