Mercedes-Benz 2008 M-Class Operator's Manual page 363

Operation
Tires and wheels
If you wish to confirm activation:
Press button æ.
The following message will appear in
the multifunction display:
Run Flat Indicator
Restarted
After a certain "learning phase", the Run
Flat Indicator checks the set pressure val-
ues for all four tires.
If you wish to cancel activation:
Press button ç.
or
Wait until the message
Restart
Run Flat Indicator?
Yes
Cancel
disappears.
362
Checking tire pressure electronically
with the Tire Pressure Monitoring
System (TPMS), (USA only)
i
T P M
The ire ressure onitoring
(TPMS) is equipped with a combination low tire
pressure/TPMS malfunction telltale in the
instrument cluster ( page 27). Depending on
how the telltale illuminates, it indicates a low tire
pressure condition or a malfunction in the TPMS
system itself:
If the telltale illuminates continuously,
one or more of your tires is significantly
underinflated. There is no malfunction in the
TPMS.
If the telltale flashes for 60 seconds and
then stays illuminated, the TPMS system
itself is not operating properly.
i
This device complies with Part 15 of the
FCC Rules. Operation is subject to the following
two conditions:
(1) This device may not cause harmful interfer-
S
ystem
ence, and
(2) this device must accept any interference
received, including interference that may
cause undesired operation.
Any unauthorized modification to this device
could void the user's authority to operate the
equipment.
The TPMS only functions on wheels that
are equipped with the proper electronic
sensors. It monitors the tire inflation pres-
sure, as selected by the driver, in all four
tires. A warning is issued to alert you to a
decrease in pressure in one or more of the
tires.