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Advice
●
The wheel
s
of
one axle are under more
pressure (for example, driving with a trailer or
on steep slopes).
●
The vehicle is fitted with snow chains.
●
The temporary spare wheel is fitted.
●
The wheel on one axle is changed.
Tyre pressure adjustment
On adjusting tyre pressure or changing one
or more wheels, the ››› Fig. 179 button must
be kept pressed down, with the ignition on,
until an acoustic signal is heard.
Store the new tyre pressure in the Easy Con-
nect system with the button
and the func-
tion b
utt
on
Set
up
›
›
›
p
age 24.
If the wheels are under excessive load (for ex-
ample, driving with a trailer or heavy load),
the tyre pressure must be increased to the
recommended value for a full load (see the
sticker on the inside of the fuel flap). If the
tyre monitor system button is pressed down,
the new tyre pressures are confirmed.
The tyre pressure control lamp lights up
If the tyre pressure of a wheel is much lower
than the value set by the driver, then the tyre
pressure control lamp ›››
will light up.
WARNING
●
When the tyre pr
essure control lamp lights
up, reduce speed immediately and avoid any
sudden turning or braking manoeuvre. Stop
when poss
ible, and check the tyre pressure
and status.
●
The driver is responsible for maintaining
correct tyre pressures. For this reason, tyre
pressure must be regularly checked.
●
Under certain circumstances (e.g. when
driving in a sporty manner, in winter condi-
tions or on a dirt track) the tyre control lamp
may light up belatedly or may function incor-
rectly.
Note
If the battery is disconnected, the yellow
warning l
amp lights up after turning the
ignition on. This should turn off after a brief
journey.
Winter service
W
int
er ty
res
In winter conditions winter tyres will consid-
er
ab
ly
improve the vehicle's handling. The
design of summer tyres (width, rubber com-
pound, tread pattern) gives less grip on ice
and snow.
Winter tyres must be inflated to a pressure of
0.2 bar (2.9 psi/20 kPa) higher than the pres-
sures specified for summer tyres (see sticker
on fuel tank flap).
Winter tyres must be fitted on all four wheels.
Information on permitted winter tyre sizes
can be found in the vehicle's registration
documentation. Use only radial winter tyres.
All tyre sizes listed in the vehicle documenta-
tion also apply to winter tyres.
Winter tyres lose their effectiveness when the
tread is worn down to a depth of 4 mm.
The speed rating code ››› page 212, New
tyres and wheels determines the following
speed limits for winter tyres: ›››
max. 160 km/h (99 mph)
m
ax. 180 km/h (112 mph)
m
ax. 190 km/h (118 mph)
m
ax. 210 km/h (130 mph)
In some countries, vehicles which can exceed
the speed rating of the fitted tyre must have
an appropriate sticker in the driver's field of
view. These stickers are available from your
technical service. The legal requirements of
each country must be followed.
Do not have winter tyres fitted for unnecessa-
rily long periods. Vehicles with summer tyres
handle better when the roads are free of
snow and ice.
If you have a flat tyre, please refer to the
notes on the spare wheel ››› page 212, New
tyres and wheels.
Q
S
T
H
214
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