Vehicle care
257
illuminates. For the further three
wheels the system remains
operational.
The use of commercially available
liquid tyre repair kits can impair the
function of the system. Factory-
approved repair kits can be used.
Operating electronic devices or being
close to facilities using similar wave
frequencies could disrupt the tyre
pressure monitoring system.
Each time the tyres are replaced, tyre
pressure monitoring system sensors
must be dismounted and serviced.
For the screwed sensor, replace
valve core and sealing ring. For the
clipped sensor, replace complete
valve stem.
The Tyre Load menu only appears
when the vehicle is at a standstill and
the parking brake is applied. On
vehicles with automatic transmission
the selector lever must be in P.
before the system recalculates. The
following relearn process takes up to
10 minutes of driving in a speed range
of 25 to 60 mph. Avoid to drive outside
of this range for a longer time. If
possible, use a country road or similar
which allows continuous driving.
During relearn process $ can be
displayed or pressure values can
swap in the Driver Information Centre.
If problems occur during the relearn
process, a failure message is
displayed in the Driver Information
Centre. w will flash for 60 seconds
and then illuminate continuously.
If this happens, repeat learning
process. Keep your vehicle stationary
for approx. 20 minutes and then drive
again for 10 minutes as described
above.
Select:
●
●
●
Light for comfort pressure up to
Vehicle loading status
3 people.
Adjust tyre pressure to load condition
according tyre information label or
tyre pressure chart 3 291, and select
the appropriate setting in Tyre Load
within the vehicle information menu
3 110. This setting determines the
reference pressures for the tyre
pressure warnings.
Eco for Eco pressure up to
3 people.
Max for full loading.
Tread depth
Check tread depth at regular
intervals.
Tyres should be replaced for safety
reasons at a tread depth of 2-3 mm
(4 mm for winter tyres).
Auto learn function
After changing wheels or wheel
positions the vehicle must be
stationary for approx. 20 minutes,