Mercedes-Benz GLS Owner's Manual page 415

412 Wheels and tyres
Furthermore, the use of certain tyre types in
R
certain regions and areas of operation can
be highly beneficial.
Only use tyres and wheels of the same type
R
(summer tyres, winter tyres, MOExtended
tyres) and the same make.
Only fit wheels of the same size on one axle
R
(left and right).
It is only permissible to fit a different wheel
size in the event of a flat tyre in order to
drive to the specialist workshop.
Do not make any modifications to the brake
R
system, the wheels or the tyres.
The use of shims or brake dust shields is not
permitted and may invalidate the vehicle's
general operating permit.
Vehicles with a tyre pressure monitoring
R
system: all fitted wheels must be equipped
with functioning sensors for the tyre pres‐
sure monitoring system.
At temperatures below 7 °C use winter tyres
R
or all-season tyres marked i M+S for all
wheels.
Winter tyres provide the best possible grip in
wintry road conditions.
For M+S tyres, only use tyres with the same
R
tread.
Observe the maximum permissible speed for
R
the M+S tyres fitted.
If the tyre's maximum speed is below that of
the vehicle, this must be indicated by an
appropriate label in the driver's field of
vision.
Run in new tyres at moderate speeds for the
R
first 100 km.
Replace the tyres after six years at the latest,
R
regardless of wear.
When replacing with tyres that do not
R
feature run-flat characteristics: vehicles
with MOExtended tyres are not equipped
with a TIREFIT kit at the factory. Equip the
vehicle with a TIREFIT kit after replacing with
tyres that do not feature run-flat characteris‐
tics, e.g. winter tyres.
% You can permanently limit the maximum
vehicle speed for driving with winter tyres
( page 241).
/
For more information on wheels and tyres, con‐
tact a qualified specialist workshop.
Be sure to also observe the following further
related subjects:
Notes on tyre pressure (
/
R
Tyre pressure table ( page 407)
/
R
Notes on the emergency spare wheel
R
( page 420)
/
Notes on interchanging wheels
& WARNING Risk of injury through differ‐
ent wheel sizes
Interchanging the front and rear wheels can
severely impair the driving characteristics.
The disk brakes or wheel suspension compo‐
nents may also be damaged.
page 406)