Operation Manual

Drive control systems142
Tyre pressure monitoring
system 3
The tyre pressure monitoring system
continually checks the pressure of all four
wheels whilst driving.
A pressure sensor is integrated in each
wheel. Once a minute, the pressure of each
tyre is sent to a control unit, where it is
compared. If the system detects one or
more pressure differences, a message
appears on the inform ation d isplay.
In vehicles with Graphical Information
Display 3 or Colour Information Display 3
and trip computer 3, current tyre pressures
can be shown in the information display.
For the system to b e operational, all wheels
must be equipped with pressure sensors
and all tyres must be filled to the
prescribed pressure . The ty re pre ssure
monitoring system automatically detects if
the vehicle is being driven with a load of up
to 3 persons or a full load.
Once the ignition is switched on, the system
is operational and will continuously
monitor the tyre pressures at speeds of
approx. 25 mph (40 km/h) and above.
Tyre pressure – see pages 207.
9 Wa rnin g
The tyre pressure monitoring system does
not replace manual checks with a
suitable gauge.
Check tyre pressures at least every
14 days and prior to any long journey;
the tyres should be checked when cold.
Don’t forget to check the spare 3.