Owners Manual

i
The tire pressure values indicated by the
on-board computer may differ from those
measured at a gas station using a pressure
gauge. The on-board computer will
generally give you a more exact value.
Tire pressure loss warning system
Vehicles without steering wheel buttons
The h tire pressure warning lamp in the
instrument cluster comes on if the pressure
of one or more tires drops significantly.
i
US vehicles only:
If the h tire pressure warning lamp
flashes for just 60seconds and then is lit
permanently, the tire pressure monitor is
malfunctioning (Y page 198).
If a malfunction of the tire pressure monitor
is recognized, the h tire pressure
warning lamp shows this at the latest after
ten minutes.
Vehicles with steering wheel buttons
A message is displayed and the h tire
pressure warning lamp in the instrument
cluster comes on if the pressure of one or
more tires drops significantly.
The tire pressure is shown in two red
rectangles. The pressure of the tire
concerned is shown in one of the two
rectangles (Y page 201). A warning tone also
sounds.
i
US vehicles only:
If the h tire pressure warning lamp
flashes for just 60seconds and then is lit
permanently, the tire pressure monitor is
malfunctioning (Y page 198).
If a malfunction of the tire pressure monitor
is recognized, the h tire pressure
warning lamp shows this at the latest after
ten minutes.
Reactivating the tire pressure monitor
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
mounted new wheels or tires
If you wish to define new reference values
manually:
X
Refer to the table on the tire data labels
(Y page 264) to make sure that the
pressure of all four tires is set correctly.
Observe the notes on tire pressures in the
"Tires and wheels" section (Y page 288).
Vehicles without steering wheel buttons
X
Turn the key to position 2 in the ignition
lock.
X
Press the 4 menu button on the
instrument cluster repeatedly until the
following message is displayed:
+CAL- TPMS
X
Press the f button on the instrument
cluster.
The following message is displayed:
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 pressure monitor
considers them to be plausible.
If you wish to cancel the activation process:
X
Press the g button or the 4 menu button
on the instrument cluster.
The activation will be automatically
canceled without warning after
30 seconds.
268
Tire pressure
Wheels and tires