Fault in radio signal transmission
The function of the system may be tempo-
rarily impaired by radio transmitters that
operate in the same frequency band as the
tyre pressure sensors → page 364.
Metal valve caps can interfere with the ra-
dio signal transmission of the sensors.
A tyre pressure sensor may not be detected
by the system as a result → page 364.
Spare wheel or temporary spare wheel
The tyre pressure of the stowed spare
wheel or the temporary spare wheel is not
monitored. The stowed spare wheel or
temporary spare wheel does not rotate and
is therefore in sleep mode.
NOTICE
Incorrect handling of the tyre valves can
dama
ge the pressure sensors and impair
functioning of the Tyre Pressure Monitoring
System.
·
The pressure sensors are secured to spe-
cial aluminium valves that are screwed
rigidly in place. When inflating the tyres
and checking the pressure, do not bend
the valves “into position”.
·
Missing valve caps could lead to damage
to the valve and the sensors. You should
therefore always make sure that all valve
caps are fully screwed on while driving.
·
Do not use metallic valve caps.
·
Do not use “convenience” valve caps as
they do not form a proper seal. This can
cause damage to the sensors. “Conven-
ience” valve caps are valve caps that do
not have to be unscrewed in order to in-
flate the tyre.
Adjusting the Tyre Pressure Moni-
t
oring System
Adjusting the tyre pressure
Following any change in the vehicle load,
the tyre pressure must be checked and ad-
justed as necessary. The tyre pressures rec-
ommended for the vehicle are on a sticker
on the driver door pillar or on the inside of
the tank flap → page 350.
There may be dierenc
es between read-
ings on the pressure gauge when filling the
tyres and the values determined by the
Tyre Pressure Monitoring System. The TPM
is more precise.
Selecting target tyre pressures for par-
tial and full loads
The driver must select the appropriate tar-
get tyre pressure depending on the vehicle
load level:
1. Switch on the ignition.
2. Tap
App
overview
in the Infotainment
system.
3.
Tap
Vehicle
.
4
. Tap
Status
.
5.
Tap
Tyre
pressure
.
6
. Select the load level on the tab at the
top right edge of the screen.
Selecting tyre type
If the tyre size is changed, it may be neces-
sary to adjust the target tyre pressure for
the new tyres. If no adjustment is necessa-
ry, the selection menu will not be available.
1. Switch on the ignition.
2. Tap
App
overview
in the Infotainment
system.
3.
Tap
Vehicle
.
4
. Tap
Vehicle
.
5.
Tap
Tyres
.
6
. Tap
Tyre
designation
.
7
. Select the appropriate tyre size.
If the size of the fitted tyres does not corre-
spond to the factory-specified tyres, the
corresponding target tyre pressure can be
entered by a suitably qualified workshop.
Spare wheel
If the vehicle is factory-fitted with a spare
wheel with the same tyre and rim combina-
tion as the other wheels, the spare wheel
also has a compatible tyre pressure sensor.
The tyre pressure of the spare wheel under
the vehicle is not monitored.
Tyre Pressure Monitoring System 363
2KF012720AE
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