Tyre pressure loss warning system
General notes
While the vehicle is in motion, the tyre pressure
loss warning system monitors the set tyre pres-
sure using the rotational speed of the wheels.
This enables the system to detect significant
pressure loss in a tyre. If the speed of rotation of
a wheel changes as a result of a loss of pressure,
a corresponding warning message will appear in
the multifunction display.
You can recognise the tyre pressure loss warn-
ing by the
Run Flat Indicator active
Run Flat Indicator active
Restart with OK
Restart with OK
message which appears in
the
Serv.
Serv.
menu of the multifunction display.
Information on the message display can be
found in the "Restarting the tyre pressure loss
warning system" section (
Y
page 410).
Important safety notes
The tyre pressure warning system does not warn
you of an incorrectly set tyre pressure. Observe
the notes on the recommended tyre pressure
(
Y
page 408).
The tyre pressure loss warning does not replace
the need to regularly check the tyre pressures.
An even loss of pressure on several tyres at the
same time cannot be detected by the tyre pres-
sure loss warning system.
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. Avoid abrupt steering
manoeuvres.
The function of the tyre pressure loss warning
system is limited or delayed if:
R
snow chains are fitted to your vehicle's tyres.
R
road conditions are wintry.
R
you are driving on sand or gravel.
R
you adopt a very sporty driving style (corner-
ing at high speeds or driving with high rates of
acceleration).
R
you are towing a very heavy or large trailer.
R
you are driving with a heavy load (in the vehi-
cle or on the roof).
Restarting the tyre pressure loss warn-
ing system
Restart the tyre pressure loss warning system if
you have:
R
changed the tyre pressure
R
changed the wheels or tyres
R
fitted new wheels or tyres
X
Before restarting, make sure that the tyre
pressures are set properly on all four tyres for
the respective operating conditions. The rec-
ommended tyre pressures can be found in the
tyre pressure table on the fuel filler flap.
The tyre pressure loss warning system can
only give reliable warnings if you have set the
correct tyre pressure. If an incorrect tyre
pressure is set, these incorrect values will be
monitored.
X
Observe the notes in the section on tyre pres-
sures (
Y
page 408).
X
Make sure that the key is in position 2 in the
ignition lock (
Y
page 158).
X
Press the
=
or
;
button on the steering
wheel to select the
Serv.
Serv.
menu.
X
Press the
9
or
:
button to select
Tyre pressure
Tyre pressure
.
X
Press the
a
button.
The
Run Flat Indicator active
Run Flat Indicator active
Restart with OK
Restart with OK
message appears in the
multifunction display.
If you wish to confirm the restart:
X
Press the
a
button.
The
Tyre
Tyre press.
press. now
now OK?
OK?
message appears
in the multifunction display.
X
Press the
9
or
:
button to select
Yes
Yes
.
X
Press the
a
button.
The
Run Flat Indicator restarted
Run Flat Indicator restarted
mes-
sage appears in the multifunction display.
After a teach-in period, the tyre pressure loss
warning system will monitor the set tyre pres-
sures of all four tyres.
If you wish to cancel the restart:
X
Press the
%
button.
or
X
When the
Tyre press. now OK?
Tyre press. now OK?
message
appears, press the
9
or
:
button to
select
Cancel
Cancel
.
410
Tyre pressure
Whe
el
s
and
tyres
