Directives To Be Observed; Maintenance And Care Of Wheels And Tires; Wet Road Surface; Checking - Mercedes-Benz 2011 GLK-Class Operator's Manual

Directives to be observed

Only mount tires and wheels of the same
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type and make.
Only mount tires of the correct size onto
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the wheels.
After mounting new tires, run them in at
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moderate speeds for the first 60 miles
(100 km) as they only reach their full
performance after this distance.
Do not use tires until they are excessively
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worn as the tire traction on wet road
surfaces decreases significantly when the
tread depth is less than
If the vehicle is heavily laden, check the tire
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pressure and adjust it if necessary.
When parking your vehicle, make sure that
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the tires do not get deformed by the curb
or other obstacles. If it is necessary to drive
over curbs, speed humps or similar
elevations, try to do so slowly and at an
obtuse angle. Otherwise, the tires,
particularly the sidewalls, can get
damaged.
Maintenance and care of wheels and
tires
Checking wheels and tires
G
Warning
Regularly check the tires for damage.
Damaged tires can cause tire inflation
pressure loss. As a result, you could lose
control of your vehicle.
Worn, old tires can cause accidents. If the tire
tread is worn to minimum tread depth, or if
the tires have sustained damage, replace
them.
Regularly check the wheels and tires of
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your vehicle for damage (e.g. cuts,
punctures, tears, bulges on tires and
deformation or cracks or severe corrosion
on wheels), at least once a month, as well
as after driving off-road or on rough roads.

Maintenance and care of wheels and tires

1
/ in (3 mm).
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Damaged wheels can cause a loss of tire
pressure.
Regularly check the tire tread depth and
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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.
All wheels must have a valve cap to protect
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the valve against dirt and moisture. Do not
install anything on the valve (such as tire
pressure monitoring systems) other than
the standard valve cap or other valve caps
approved by Mercedes-Benz for your
vehicle.
Regularly check the pressure of all the tires
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including the emergency spare wheel or the
spare wheel, particularly prior to long trips,
and correct the pressure as necessary
( Y page 266).
Service life of tires
The service life of tires depends on the
following factors amongst other things:
driving style
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tire pressure
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mileage
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Replace the tires after six years at the latest,
regardless of wear. This also applies to the
emergency spare wheel/spare wheel.

Tire tread

G
Warning
Although the applicable federal motor vehicle
safety laws consider a tire to be worn when
the tread wear indicators (TWI) become
visible at approximately
recommend that you do not allow your tires
to wear down to that level. As tread depth
1
approaches / in (3 mm), the adhesion
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properties on a wet road are sharply reduced.
page 265). If necessary,
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/ in (1.6 mm), we
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265
Z