Mercedes-Benz S 320 CDI, Owner'S Manual

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401
Operation
Tyres and wheels
!
Store tyres in a cool, dry place, preferably in
the dark. Protect the tyres from oil, grease, pet-
rol and diesel fuel.
Do not clean your wheels with acidic wheel
cleaners since these could corrode the heads of
wheel bolts.
Tyres with a specified direction of rotation
have additional benefits, e.g. if aquaplan-
ing occurs. These benefits will only be
available to you if the correct direction of
rotation is observed.
An arrow on the sidewall of the tyre indi-
cates its correct direction of rotation.
i
You may fit a spare tyre* against the direc-
tion of rotation.
The MO Extended emergency running sys-
tem enables you to continue driving the ve-
hicle even when all air is lost from one or
more tyres.
You may only use the MO
Extended run-flat
system in conjunction with the tyre pres-
sure loss warning system or the tyre pres-
sure monitor.
You will find notes on driving with a flat
tyre in the Practical advice section
(
컄
page 517).
Only correct tyre pressures when the tyres
are cold.
The pressure of warm tyres should only be
corrected if it is too low for the current op-
erating conditions. Warm tyres always
have higher pressures than cold ones.
You will find a table of tyre pressures for
different operating conditions on the in-
side of your vehicle’s fuel filler flap.
i
Tyre pressure values given for low loads are
minimum values which offer you good ride com-
fort characteristics.
You can, however, also use the values for higher
loads. These are permissible and will not ad-
versely affect the running of the vehicle. Howev-
er, ride comfort will be impaired to some degree.
Also check the tyre pressure of the spare
wheel*.
Tyre pressure changes by approximately
0.1 bar for every 10 °C change in ambient
temperature.
If you measure the tyre pressure indoors
where the temperature differs from the
outside temperature, you will have to cor-
rect the measured value accordingly.
When the vehicle is driven, the tyre tem-
perature, and with it the tyre pressure, will
increase depending on the road speed and
the load on the tyres.
While the vehicle is in motion the tyre pres-
sure loss warning system monitors the tyre
pressure set by evaluating the speed of the
individual wheels. The system can there-
fore recognise any significant loss of tyre
pressure in a wheel.
Direction of rotation
MO Extended run-flat system*
Tyre pressures
G
Risk of accident
If the pressure in a tyre drops repeatedly, in-
spect the tyre for foreign objects and check
whether the tyre or valve are leaking.
G
Risk of accident
Check tyre pressure regularly, at least every
two weeks. If the tyre pressure is incorrect,
your vehicle’s handling characteristics could
be altered or the tyre could explode.
Tyre pressure loss warning system