Mercedes-Benz M-Class 2012 Owners Manual - Manual (Page 363)

mounted is not the same as the spare
wheel/emergency spare wheel's current
tire pressure.
Tire pressure monitor warning
messages
If the tire pressure monitor detects a
significant pressure loss on one or more tires,
a warning message is shown in the
multifunction display. A warning tone also
sounds and the tire pressure warning lamp
lights up in the instrument cluster.
Each tire that is affected by a significant loss
of pressure is highlighted with a color.
If the
Correct Tire Pressure message
appears in the multifunction display:
X
Check the tire pressure on all four wheels
and correct it if necessary.
i If the wheel positions on the vehicle are
interchanged, the tire pressures may be
displayed for the wrong positions for a
short time. This is rectified after a few
minutes of driving, and the tire pressures
are displayed for the correct positions.
Restarting the tire pressure monitor
G WARNING
It is the driver's responsibility to set the tire
pressure to the recommended cold tire
pressure. Underinflated tires affect the ability
to steer or brake the vehicle. You might lose
control over the vehicle.
When you restart the tire pressure monitor,
all existing warning messages are deleted and
the warning lamps go out. The monitor uses
the currently set tire pressures as the
reference values for monitoring. In most
cases, the tire pressure monitoring system
recognizes the new reference values
automatically.
However, you can also define reference
values manually as described here:
X Set the tire pressure (
Y
page 353) to the
value recommended for the corresponding
driving situation on the Tire and Loading
Information placard on the driver's side
B-pillar.
Additional tire pressure values for driving
at high speeds or with heavy loads can be
found in the tire pressure table on the
inside of the fuel filler flap.
X
Make sure that the tire pressure is correct
on all four wheels.
X Make sure that the SmartKey is in position
2 in the ignition lock.
X
Press the = or ; button on the
steering wheel to select the Serv. menu.
X Press the 9 or : button to select
Tire Pressure .
X Press the a button.
The multifunction display shows the
current tire pressure of the individual tires
or the Tire pressure will be
displayed after driving a few
minutes message.
X Press the : button.
The Use Current Pressures as New
Reference Values message appears in
the multifunction display.
If you wish to confirm the restart:
X Press the a button.
The Tire Press. Monitor Restarted
message appears in the multifunction
display.
After driving for a few minutes, the system
checks whether the current tire pressures
are within the specified range. The new tire
pressures are then accepted as reference
values and monitored.
If you wish to cancel the restart:
X
Press the % button.
The tire pressure values stored at the last
restart will continue to be monitored.
Tire pressure
361
Wheels
and
tires
Z