
214 OperationTires and wheels
4
\1Repeat this procedure for each tire.
Checking tire pressure electronically
with the Tire Pressure Monitoring Sys-
tem (TPMS)* (vehicles without steering
wheel buttons)
Vehicles without steering wheel buttons
are equipped with the Tire Pressure Moni-
toring System.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.
!
CAUTION
After inspecting or adjusting the tire in-
flation pressure, always reattach the
valve cap if equipped.
This will prevent moisture and dirt from
entering the valve stem, which could
damage the valve stem.
iUSA only:
The Tire Pressure Monitoring System
(TPMS) is equipped with a combination
low tire pressure/TPMS malfunction
telltale in the instrument cluster
(\2page 14). Depending on how the
telltale illuminates, it indicates a low
tire pressure condition or a malfunction
in the TPMS system itself:
\4If the telltale illuminates continu-
ously, one or more of your tires is
significantly underinflated. There is
no malfunction in the TPMS.
\4If the telltale flashes for 60 seconds
and then stays illuminated, the
TPMS system itself is not operating
properly.
iCanada only:
The Tire Pressure Monitoring System
(TPMS) is equipped with a low tire pres-
sure telltale in the instrument cluster
(\2page 14). If the telltale illuminates,
one or more of your tires is significantly
underinflated.Warning
G
The TPMS does not warn you against incor-
rectly selected tire inflation pressure and
does not warn you when the tire pressure is
not properly selected for the respective ve-
hicle load. It warns you only when the pres-
sure of one or more tires decreases
significantly below the reference inflation
\2\2

216 OperationTires and wheels
4
Reactivating the TPMS
The TPMS must be reactivated when you
have adjusted the tire inflation pressure to
a new level (e.g. because of different load
or driving conditions). The TPMS is then
recalibrated to the current tire inflation
pressures.\1Using the tire and loading information
placard on the driver’s door B-pillar
(\2page 206), make sure the tire infla-
tion pressure of all four tires is correct.
\1Switch on the ignition (\2page 67).
\1Press the 5menu button on the instru-
ment cluster until you see the
+CAL TPMS
message in the display.
TPMS malfunctions may occur for a variety
of reasons, including the installation of in-
compatible replacement or alternate tires or
wheels on the vehicle that prevent the TPMS
from functioning properly. Always check the
TPMS malfunction telltale after replacing
one or more tires or wheels on your vehicle
to ensure that the replacement or alternate
tires and wheels allow the TPMS to continue
to function properly.iIf a condition causing the TPMS to mal-
function develops, it may take up to 10
minutes for the system to signal a mal-
function using the TPMS telltale flash-
ing and illumination sequence.
The telltale extinguishes after driving a
few minutes if the malfunction has
been corrected.
iOperating radio transmission equip-
ment (e.g. wireless headsets, two-way
radios) in or near the vehicle could
cause the TPMS to malfunctionWarning
G
It is the driver’s responsibility to calibrate
the TPMS on the recommended cold infla-
tion pressure. Underinflated tires affect the
ability to steer or brake the vehicle. You
might lose control over the vehicle.
iReactivate the TPMS after adjusting
the tire inflation pressure to the infla-
tion pressure recommended for the ve-
hicle operating condition. Tire pressure
should only be adjusted on cold tires.
Observe the recommended tire infla-
tion pressure on the tire and loading in-
formation placard on the driver’s door
B-pillar (\2page 206).

217 Operation
Tires and wheels
4
\1Press the ,menu button on the instru-
ment cluster.
The following message is displayed:
OK TPMSThe tire pressure monitor activation
process has begun.
The tire pressures of the individual
wheels are stored as the new reference
values if they are determined to be
plausible for the tire pressure monitor.
If you wish to cancel the activation pro-
cess:
\1Press the .button or the 5menu button
on the instrument cluster.
The activation process is canceled au-
tomatically if 30 seconds elapse with
no input.Checking tire pressure electronically
with the Tire Pressure Monitoring Sys-
tem (TPMS)* (vehicles with steering
wheel buttons)
Vehicles with steering wheel buttons are
equipped with the Advanced Tire Pressure
Monitoring System.
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.
Tire pressure inquiries are made using the
multifunction display. The present inflation
pressures are displayed only after a few
minutes’ travel time.
iUSA only:
The Tire Pressure Monitoring System
(TPMS) is equipped with a combination
low tire pressure/TPMS malfunction
telltale in the instrument cluster
(\2page 14). Depending on how the
telltale illuminates, it indicates a low
tire pressure condition or a malfunction
in the TPMS system itself:
\4If the telltale illuminates continu-
ously, one or more of your tires is
significantly underinflated. There is
no malfunction in the TPMS.
\4If the telltale flashes for 60 seconds
and then stays illuminated, the
TPMS system itself is not operating
properly.
iCanada only:
The Tire Pressure Monitoring System
(TPMS) is equipped with a low tire pres-
sure telltale in the instrument cluster
(\2page 14). If the telltale illuminates,
one or more of your tires is significantly
underinflated.

220 OperationTires and wheels
4
Reactivating Advanced TPMS
The TPMS must be reactivated when you
have adjusted the tire inflation pressure to
a new level (e.g. because of different load
or driving conditions). The TPMS is then
recalibrated to the current tire inflation
pressures.\1Using the tire and loading information
placard on the driver’s door B-pillar
(\2page 206), make sure the tire infla-
tion pressure of all four tires is correct.
\1Press buttonè orÿ on the mul-
tifunction steering wheel repeatedly
until the standard display menu ap-
pears in the multifunction display
(\2page 93).
TPMS malfunctions may occur for a variety
of reasons, including the installation of in-
compatible replacement or alternate tires or
wheels on the vehicle that prevent the TPMS
from functioning properly. Always check the
TPMS malfunction telltale after replacing
one or more tires or wheels on your vehicle
to ensure that the replacement or alternate
tires and wheels allow the TPMS to continue
to function properly.iIf a condition causing the TPMS to mal-
function develops, it may take up to 10
minutes for the system to signal a mal-
function using the TPMS telltale flash-
ing and illumination sequence.
The telltale extinguishes after driving a
few minutes if the malfunction has
been corrected.
iOperating radio transmission equip-
ment (e.g. wireless headsets, two-way
radios) in or near the vehicle could
cause the TPMS to malfunctionWarning!
G
It is the driver’s responsibility to calibrate
the TPMS on the recommended cold infla-
tion pressure. Underinflated tires affect the
ability to steer or brake the vehicle. You
might lose control over the vehicle.
iReactivate the TPMS after adjusting
the tire inflation pressure to the infla-
tion pressure recommended for the ve-
hicle operating condition. Tire pressure
should only be adjusted on cold tires.
Observe the recommended tire infla-
tion pressure on the tire and loading in-
formation placard on the driver’s door
B-pillar (\2page 206).