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The vehicle is displayed with the target
and actual tyre pressures of all the
wheels
→
.
When the ignition is switched on, the last
measured tyre pressures will be displayed
first;
these values will be updated when the
trip is started. If the tyre pressure is too low,
the respective actual values and the
affec-
ted
tyres will be marked
→
.
If the tyres are in rest state, the tyre pres-
sure sensors will not transmit any tyre pres-
sures. This stops the tyre pressure sensor
batteries discharging.
The last received tyre pressures are shown
in grey if no tyre pressures are transmitted.
Switching the Tyre Pressure Monitoring
System on and off (vehicle-dependent)
Observe any
country-specific
legal require-
ments for the Tyre Pressure Monitoring
System.
If a set of tyres is
fitted
to the vehicle where
the tyres either do not have wheel sensors
or have wheel sensors that are not compat-
ible with the vehicle, the indicator lamp
will
flash
for approximately 1 minute and
then light up steadily. The tyre pressures
will not be monitored. The system cannot
be switched
off.
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 339.
There may be
differences
between the
readings on the pressure gauge when
filling
the tyres and the values determined by the
TPM. 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
Vehicle
in the Infotainment system.
3. Tap
Status
.
4. Tap
Tyre pressure
.
5. Select the load level.
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
Vehicle
in the Infotainment system.
3. Tap
Vehicle
.
4. Tap
Tyres
.
5. Tap
Tyre designation
.
6. 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 correspondingly
qualified
workshop.
Spare wheel, temporary spare wheel or
collapsible spare wheel
The system does not monitor the tyre pres-
sure of the spare wheel, temporary spare
wheel or collapsible spare wheel.
NOTICE
·
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.
Troubleshooting for Tyre Pressure
Loss Indicator
Please refer to at the start of the
chapter on page 329.
Low tyre pressure
The indicator lamp lights up yellow.
332
Wheels and tyres
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