Mercedes-Benz S-Class 2013 Owner's Manual page 449

Tyre pressure
446
The tyre pressure monitor has a yellow warn-
ing lamp in the instrument cluster for indicat-
ing a pressure loss or malfunction. Depending
on how the warning lamp flashes or lights up,
a tyre pressure that is too low or a malfunc-
tion in the tyre pressure monitor is indicated:
if the warning lamp is lit continuously, the
R
tyre pressure on one or more tyres is sig-
nificantly too low. The tyre pressure moni-
tor is not malfunctioning.
if the warning lamp flashes for around a
R
minute and then remains lit constantly, the
tyre pressure monitor is malfunctioning.
i
In addition to the warning lamp, a mes-
sage appears in the multifunction display.
Further information can be found on
( page 348).
Y
If the tyre pressure monitor is malfunctioning,
it may take more than ten minutes for the tyre
pressure warning lamp to inform you of the
malfunction by flashing for approximately one
minute and then remaining lit. When the fault
has been rectified, the tyre pressure warning
lamp goes out after you have driven for a few
minutes.
The tyre pressure values indicated by the on-
board computer may differ from those meas-
ured at a filling station using a pressure
gauge. The tyre pressures shown by the on-
board computer refer to those measured at
sea level. At high altitudes, the tyre pressure
values indicated by a pressure gauge are
higher than those shown by the on-board
computer. In this case, do not reduce the tyre
pressures.
The operation of the tyre pressure monitor
can be affected by interference from radio
transmitting equipment (e.g. radio head-
phones, two-way radios) that may be being
operated in or near the vehicle.
Checking the tyre pressure electroni-
cally
Make sure that the key is in position
X
2( page 191) in the ignition lock.
Y
Use ò on the steering wheel to call up
X
the list of menus.
Press the 9 or : button on the steer-
X
ing wheel to select the
Press the a button.
X
Press the 9 or : button to select
X
Tyre pressure Tyre pressure.
Press the a button.
X
The current tyre pressure for each wheel
will be displayed in the multifunction dis-
play.
If the vehicle has been parked for over
20 minutes, the Tyre pressures Tyre
displayed after a few minutes of displayed after a few minutes of
driving driving message appears.
After a teach-in period, the tyre pressure
monitor automatically recognises new
wheels or new sensors. As long as a clear
allocation of the tyre pressure values to the
individual wheels is not possible, the
pressure monitor active pressure monitor active
sage is shown instead of the tyre pressure
display. The tyre pressures are already being
monitored.
i
If an emergency spare wheel is fitted, the
system may continue to show the tyre pres-
sure of the wheel that has been removed
for a few minutes. If this occurs, note that
the value displayed for the position where
the spare wheel is fitted is not the same as
the current tyre pressure of the emergency
spare wheel.
Serv. Serv. menu.
pressures will will be be
Tyre Tyre
display mes-