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If w illuminates at lower temperatures
and extinguishes after driving, this
could be an indicator for getting low
pressure. Check tyre pressure.
Vehicle messages 3 100.
If the tyre pressure must be reduced or increased, switch off ignition.
Only mount wheels with pressure
sensors, otherwise the tyre pressure
will not be displayed and w
illuminates continuously.
A spare wheel or temporary spare
wheel is not equipped with pressure
sensors. The tyre pressure
monitoring system is not operational
for these tyres. Control indicator w
illuminates. For the further three tyres
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.
External high-power radio equipment
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.
Vehicle loading status
Adjust tyre pressure to load condition according tyre information label or
tyre pressure chart 3 237, and select
the according setting in the menu Tire
Load in the DIC, Vehicle Menu 3 93.
Baselevel display and Midlevel
display:Select
■ LO for comfort pressure up to
three people
■ ECO for Eco pressure up to
three people
■ Hi for full loading
Uplevel display:
Select ■ Light for comfort pressure up to
three people
■ Eco for Eco pressure up to
three people
■ Max for full loading
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Vehicle care203
TPMS Sensor Matching
Process
Each TPMS sensor has a unique
identification code. The identification
code must be matched to a new
wheel position after rotating the
wheels or exchanging the complete
wheel set and if one or more TPMS sensors were replaced. The TPMS
sensor matching process should also be performed after replacing a spare
wheel with a road wheel containing
the TPMS sensor.
The malfunction light and the warning
message or code should go off at the
next ignition cycle. The sensors are
matched to the wheel positions, using a TPMS relearn tool, in the following
order: left side front wheel, right side
front wheel, right side rear wheel and
left side rear wheel. The turn signal
light at the current active position is
illuminated until sensor is matched.
Consult your workshop for service or
to purchase a relearn tool. There are
two minutes to match the first wheel position, and five minutes overall tomatch all four wheel positions. If it
takes longer, the matching process
stops and must be restarted.
The TPMS sensor matching process is:
1. Apply the parking brake.
2. Turn the ignition on.
3. On vehicles with automatic transmission: set the selector
lever to P.
On vehicles with manual
transmission automated: move
and hold the selector lever for
five seconds in position N until P
is displayed in the DIC. P
indicates that the sensor
matching process of the TPMS
can be started.
4. Use the MENU button on the turn
signal lever to select the Vehicle
Menu in the DIC.
5. Turn the adjuster wheel to scroll to
the tyre pressure menu.
Baselevel display and Midlevel
display:
Uplevel display:
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204Vehicle care
6. Press the SET/CLR button to
begin the sensor matching process. A message requesting
acceptance of the process should
display.
7. Press the SET/CLR button again
to confirm the selection. The horn sounds twice to signal the
receiver is in relearn mode.
8. Start with the left side front wheel.
9. Place the relearn tool against the tyre sidewall, near the valve stem.Then press the button to activate
the TPMS sensor. A horn chirp
confirms that the sensor
identification code has been
matched to this wheel position.
10. Proceed to the right side front wheel, and repeat the procedure
in Step 9.
11. Proceed to the right side rear wheel, and repeat the procedure
in Step 9.
12. Proceed to the left side rear wheel, and repeat the procedure
in Step 9. The horn sounds twice
to indicate the sensoridentification code has been
matched to the left side rear
wheel, and the TPMS sensor
matching process is no longer
active.
13. Turn off the ignition.
14. Set all four tyres to the recommended air pressure level
as indicated on the tyre pressure
label.
15. Ensure the tyre loading status is set according selected pressure
3 93.
Temperature dependency Tyre pressure depends on the
temperature of the tyre. During
driving tyre temperature and pressure increase.
The tyre pressure value displayed in
the DIC shows the actual tyre
pressure. Therefore it is important to
check tyre pressure with cold tyres.
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).
For safety reasons it is recommended
that the tread depth of the tyres on
one axle should not vary by more than
2 mm.
The legally permissible minimum
tread depth (1.6 mm) has been
reached when the tread has worn
down as far as one of the tread wear
indicators (TWI). Their position is
indicated by markings on the
sidewall.