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404 Wheels and tyres
If the preceding tyre sizes are complemented by
the + symbol, the tyre pressure information
following shows alternative tyre pressures.
These tyre pressures may improve your vehicle's
ride comfort. Fuel consumption may then
increase slightly.
The load conditions "partially laden" and "fully
laden" are defined in the table for different num‐
bers of passengers and amounts of luggage. The
actual number of seats may differ from this.
Be sure to also observe the following further
related subjects:
Notes on tyre pressure (
→
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Tyre pressure monitoring system
Function of the tyre pressure monitoring sys‐
tem
The system checks the tyre pressure and the
tyre temperature of the tyres fitted to the vehicle
by means of a tyre pressure sensor.
New tyre pressure sensors, e.g. in winter tyres,
are automatically taught-in during the first jour‐
ney they are used.
The tyre pressure and the tyre temperature
appear in the multifunction display
(
page 404).
→
If there is a substantial pressure loss or if the
tyre temperature is excessive, you will be
warned in the following ways:
via display messages (
R
via the h warning lamp in the instrument
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cluster (
The tyre pressure monitoring system is only an
aid. It is the driver's responsibility to set the tyre
pressure to the recommended cold tyre pressure
page 402)
suitable for the operating situation. Set the tyre
pressure for cold tyres using a tyre pressure
gauge. Note that the correct tyre pressure for
the current operating situation must first be
taught-in to the tyre pressure monitoring sys‐
tem.
In most cases, the tyre pressure monitoring sys‐
tem will automatically update the new reference
values after you have changed the tyre pressure.
You can, however, also update the reference val‐
ues by restarting the tyre pressure monitoring
system manually (
page 474)
→
page 502)
→
page 405).
→
System limitations
The system may be impaired or may not function
in the following situations:
if the tyre pressure is set incorrectly
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if there is a sudden pressure loss caused, for
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example, by a foreign object penetrating the
tyre
if there is a malfunction caused by another
R
radio signal source
Make sure to observe the following further rela‐
ted subject:
notes on tyre pressure (
page 402)
→
R
Checking the tyre pressure with the tyre
pressure monitoring system
Requirements:
The ignition is switched on.
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On-board computer:
Service
Tyres
One of the following displays appears:
Current tyre pressure and tyre temperature
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of the individual wheels:
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