Using the steering wheel buttons
X
Turn the SmartKey to position 2 in the ignition
lock.
X
Press the V or U button repeatedly
until the standard display is shown
(
Y page 167).
X
Press the 9 or : button repeatedly
until the current pressure of the individual
tires is shown in the display.
If the vehicle is parked for longer than
20 minutes or you then drive at less than 18 mph
(30 km/h), the Tire pres. displayed
after driving for several minutes mes-
sage appears.
i
The tire pressure value shown in the display
may differ from those measured at a gas sta-
tion using a pressure gage. The on-board
computer will generally give you a more exact
value.
Tire pressure loss warning system
Vehicles with steering wheel buttons
If the tire pressure monitor detects a pressure
loss in one or more tires, the on-board computer
displays the yellow Tire
pres. Adjust pres.
warning message. The h tire pressure loss
warning lamp in the instrument cluster
(
Y page 202) flashes for about 60 seconds and
then remains lit.
The pressure of the affected tire is highlighted in
yellow in the on-board computer (
Y page 176).
If the tire pressure monitor detects a significant
pressure loss in one or more tires, the on-board
computer displays the red Tire pres.
Warn‐
ing Tire defect warning message. The h
tire pressure loss warning lamp in the instru-
ment cluster (
Y page 202) flashes for about 60
seconds and then remains lit. An additional
warning tone sounds.
The pressure of the affected tire is highlighted in
yellow in the on-board computer (
Y page 176).
Restarting the tire pressure monitor
When you restart the tire pressure monitor, the
currently set tire pressure are taken as refer-
ence values for monitoring.
In most cases, the tire pressure monitor detects
the new reference values automatically, e.g.
after you have:
R
changed the tire pressure
R
changed wheels or tires
R
installed new wheels or tires
However, you can also define reference values
manually as described here.
Before restarting the tire pressure monitor:
X
Set the tire pressure to the value recommen-
ded on the Tire and Loading Information plac-
ard or the tire pressure table on the B-pillar on
the driver's side (
Y page 250).
Observe the notes on tire pressure when
doing so (
Y page 250).
X
Make sure that the tire pressure is correct on
all four wheels.
Restarting the tire pressure monitor (vehi-
cles without steering wheel buttons):
X
Turn the SmartKey to position 2 in the ignition
lock.
X
Press the 4 menu button on the instrument
cluster repeatedly until the display shows the
following message:
+CAL- TPMS
X
Press the f button on the instrument clus-
ter.
The display shows:
OK TPMS
The tire pressure monitor activation process
has begun. The tire pressures measured for
the individual wheels are stored as the new
reference values, provided that the tire pres-
sure monitor considers them to be plausible.
If you wish to cancel the restart:
X
Press the g button or the 4 menu button on
the instrument cluster.
The activation process is canceled automati-
cally if 30 seconds elapse without input.
Restarting the tire pressure monitor (vehi-
cles with steering wheel buttons):
X
Turn the key to position 2 in the ignition lock.
X
Press the V or U button on the steering
wheel until the standard display (
Y page 167)
appears in the display.
X
Press the 9 or : button on the steering
wheel repeatedly until the current pressure of
Tire pressure
255
Wheels and tires
Z
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