Operation Manual

Checking the tire pressure electroni-
cally
X
Make sure that the SmartKey is in position
2 in the ignition lock (Y page 131).
X
Press = or ; on the steering wheel
to select the Serv.Serv. menu.
X
Press the 9 or : button to select
Tire PressureTire Pressure.
X
Press the a button.
The current tire pressure of each tire is
shown in the multifunction display.
If the vehicle was parked for longer than
20 minutes, the Tire pressure will beTire pressure will be
displayed after driving a fewdisplayed after driving a few
minutesminutes message is shown.
After a teach-in process, the tire pressure
monitor automatically detects new wheels or
new sensors. As long as a clear allocation of
the tire pressure value to the individual
wheels is not possible, the Tire PressureTire Pressure
Monitor ActiveMonitor Active message is shown instead
of the tire pressure display. The tire pressures
are already being monitored.
Tire pressure monitor warning mes-
sages
If the tire pressure monitor detects a pressure
loss in one or more tires, a warning message
is shown in the multifunction display and the
yellow tire pressure monitor warning lamp
comes on.
R
If the Please Correct Tire PressurePlease Correct Tire Pressure
message appears in the multifunction dis-
play, the tire pressure in at least one tire is
too low and must be corrected at the next
opportunity.
R
If the Check Tire PressureCheck Tire Pressure message
appears in the multifunction display, the
tire pressure in one or more tires has drop-
ped significantly and the tires must be
checked.
R
If the Tire Pressure Warning TireTire Pressure Warning Tire
FailureFailure message appears in the multi-
function display, the tire pressure in one or
more tires has dropped suddenly and the
tires must be checked.
Observe the instructions and safety notes in
the display messages in the "Tires" section
(Y page 221).
If the wheel positions on the vehicle are rota-
ted, 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 cor-
rect positions.
Restarting the tire pressure monitor
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 refer-
ence values for monitoring. In most cases, the
tire pressure monitor will automatically
detect the new reference values after you
have changed the tire pressure. However, you
can also define reference values manually as
described here. The tire pressure monitor
then monitors the new tire pressure values.
X
Set the tire pressure to the value recom-
mended for the corresponding driving sit-
uation on the Tire and Loading Information
placard on the driver's side
B-pillar (Y page 303).
Additional tire pressure values for different
operating conditions can also be found on
the tire pressure table on the inside of the
charge socket flap (Y page 148).
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 (Y page 131).
X
Press = or ; on the steering wheel
to select the Serv.Serv. menu.
X
Press the 9 or : button to select
Tire PressureTire Pressure.
X
Press the a button.
The multifunction display shows the cur-
rent tire pressure for each tire or the TireTire
Tire pressure
309
Wheels and tires
Z