X
Press the
a
button.
The tyre pressure values stored at the last
restart will continue to be monitored.
Tyre pressure monitor*
If a tyre pressure monitor system is fitted, the
vehicle's wheels have sensors fitted that
monitor the tyre pressures in all four tyres.
The tyre pressure monitor warns you when
the pressure drops in one or more of the
tyres. The tyre pressure monitor only func-
tions if the correct wheel electronics units are
fitted to all wheels.
G
Risk of accident
The tyre pressure monitor does not warn you
of an incorrectly set tyre pressure. The table
on the inside of the fuel filler flap will help you
decide whether the tyre pressures should be
corrected.
The tyre pressure monitor is not able to warn
you of a sudden loss of pressure, e.g. if the
tyre is penetrated by a foreign object. In the
event of a sudden loss of pressure, bring the
vehicle to a halt by braking carefully. Do not
make any sudden steering movements when
doing so.
i
The operation of the tyre pressure moni-
tor can be affected by interference from
radio transmitting equipment (e.g. radio
headphones, two-way radios) that may be
being operated in or near the vehicle.
Checking tyre pressure electronically
X
Make sure that the key is in posi-
tion 2 (
Y
page 75) in the ignition lock.
X
Press the
=
or
;
button to select the
Service
menu.
X
Press the
9
or
:
button to select
Tyre press
.
X
Press the
a
button.
The current tyre pressure for each wheel will
be displayed in the multi-function display.
If the vehicle has been parked for longer than
20 minutes or if you have not driven faster
than 25 km/h since starting the vehicle, the
following message appears:
Tyre pressures will be displayed
after a few minutes of driving
i
The tyre pressure values indicated by the
on-board computer may differ from those
measured at a filling station with a pressure
gauge. The tyre pressures shown by the on-
board computer refer to those measured at
sea level. At high altitudes, the tyre pres-
sure 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.
i
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 dis-
play message
Tyre pressure monitor
active
is shown instead of the tyre pres-
sure display. The tyre pressures are already
being monitored.
Restarting the tyre pressure monitor
When you restart the tyre pressure monitor,
all existing warning messages are deleted and
the warning lamps go out. The monitor uses
the currently set tyre pressures as the speci-
fied values for monitoring.
In most cases, the tyre pressure monitor will
automatically detect the new reference val-
ues, e.g. if you have:
R
changed the tyre pressure
R
changed the wheels or tyres
R
fitted new wheels or tyres
i
You will find the menu overview on
(
Y
page 120).
If you wish to define the new reference values
manually:
228
Tyres and wheels
Operation
* optional
212_AKB; 2; 4, en-GB
mkalafa,
Version: 2.11.8.1
2009-05-05T14:17:16+02:00 - Seite 228
Dateiname: 6515346702_buchblock.pdf; erzeugt am 07. May 2009 14:16:57; WK