Mercedes-Benz S-Class Saloon W223 2021 Owner's Manual page 400

398 Wheels and tyres
If one or more tyre sizes precede a tyre pressure,
the following tyre pressure information is only
valid for those tyre sizes and their respective load
condition.
If the preceding tyre sizes are complemented by
the + symbol, the tyre pressure information
following shows alternative tyre pressures. 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.
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.
The tyre pressure and the tyre temperature
appear in the driver's display (
/
If there is a substantial pressure loss or if the tyre
temperature is excessive, you will be warned with
display messages (
warning lamp in the instrument cluster
( page 590).
/
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
suitable for the operating situation.
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 (
System limits
The system may be impaired or may not function
particularly in the following situations:
incorrect reference values were taught in
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sudden pressure loss caused by a foreign
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object penetrating the tyre, for example
there is a malfunction caused by another radio
R
page 398).
signal source
page 566) or the h
/
page 399).
/
P223 0288 02
▌Checking the tyre pressure with the tyre pres-
sure monitoring system
Requirements:
The ignition is switched on.
R
Driver display:
© Service
4 5
Select Tyre pressure and confirm with a.
#
One of the following displays appears:
Current tyre pressure of each wheel:
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Tyre pressures will be displayed after a few
R
minutes of driving