Mercedes-Benz 2013 GLS Class - Manual (Page 377)

driver's field of vision. This can be obtained
at a qualified specialist workshop.
Under these circumstances, you should also
restrict the maximum speed of the vehicle
using permanent SPEEDTRONIC so that it
does not exceed the maximum permissible
speed for the M+S tyres (
Y page 192).
When you have fitted the M+S tyres:
X Check the tyre pressures ( Y page 375).
X Restart the tyre pressure loss warning sys-
tem (
Y page 377).
X Restart the tyre pressure monitor
(
Y page 380).
For more information on driving with an emer-
gency spare wheel, see (
Y page 396).
Snow chains
G
WARNING
If you have fitted snow chains to the front
wheels, they may scrape against the vehicle
body or chassis components. This could
cause damage to the vehicle or the tyres.
There is a risk of an accident.
To avoid hazardous situations:
R never fit snow chains on the front wheels
R
fit snow chains to the rear wheels in pairs.
For safety reasons, Mercedes-Benz recom-
mends that you only use snow chains that
have been specially approved for your vehicle
by Mercedes-Benz, or that are of a corre-
sponding standard of quality.
If you intend to fit snow chains, please bear
the following points in mind:
R
snow chains cannot be fitted to all wheel-
tyre combinations. Permissible wheel-tyre
combinations (
Y page 386).
R
only use snow chains when the road sur-
face is completely snow-covered. Remove
the snow chains as soon as possible when
you come to a road that is not snow-cov-
ered.
R
local regulations may restrict the use of
snow chains. Observe the appropriate reg-
ulations if you wish to fit snow chains.
R
do not exceed the maximum permissible
speed of 50 km/h.
R
on vehicles with AIRMATIC, you must drive
at raised vehicle level if snow chains have
been fitted (
Y page 203).
i You may wish to deactivate ESP ® when
pulling away with snow chains fitted
(
Y page 70). This way you can allow the
wheels to spin in a controlled manner, ach-
ieving an increased driving force (cutting
action).
For more information on driving with an emer-
gency spare wheel, see (
Y page 396).
Tyre pressure
Tyre pressure specifications
G
WARNING
Tyres with insufficient or excessive tyre pres-
sure harbour the following hazards:
R the tyres may burst, especially as the load
and vehicle speed increase.
R
the tyres may wear excessively or unevenly
which can severely impair tyre traction.
R the handling as well as steering and braking
characteristics may be severely affected.
There is a risk of an accident.
Observe the recommended tyre pressures
and check the tyre pressure of all the tyres
including the spare wheel:
R
every day before starting a journey
R when the load changes
R
prior to long journey
R for changed operating conditions, e.g. off-
road driving
If necessary, correct the tyre pressure.
Tyre pressure
375
Wheels and tyres
Z