Display messages on vehicles without steering wheel buttons
Display messages
Possible causes/consequences and
0050
0050Solutions NO TPMS
NO TPMS The
NO
NOmessage is displayed for 30 seconds. The TPMS
TPMSmessage is
also displayed after 30 seconds.
The tire pressure monitor has malfunctioned.
X Have the tire pressure monitor and the wheels checked at a
qualified specialist workshop. NO TPMS NO TPMS The
NO
NOmessage is displayed for 30 seconds. The TPMS
TPMSmessage is
also displayed after 30 seconds.
The tire pressure monitor is not receiving signals from one or more wheels because:
R a wheel has been replaced with the spare wheel without wheel
electronics.
R the maximum temperature on one of the wheel electronics units
has been exceeded.
R the wheel electronics are malfunctioning.
X Have wheels with suitable wheel electronics units installed at a
qualified specialist workshop. — — — —
TPMS
TPMS The
— —
— — message is displayed for 30 seconds. The TPMS
TPMSmessage
is also displayed after 30 seconds.
The pressure is insufficient in one or more tires, or the pressures
of the individual tires differ significantly.
X Check the tire pressure and correct it if necessary
(Y page 291). Display
messages
199On-board computer and displays Z
X
If the tire pressure is too high, release air by
pressing down the metal pin in the valve.
Use the tip of a pen, for example. Then,
check the tire pressure again using the tire
pressure gauge.
X Screw the valve cap onto the valve.
X Repeat the steps for the other tires. Tire pressure monitor
Important safety notes G
WARNING
Each tire, including the spare (if provided),
should be checked at least once a month
when cold and inflated to the pressure rec-
ommended by the vehicle manufacturer on
the Tire and Loading Information placard on
the driver's door B-pillar or the tire pressure
label on the inside of the fuel filler flap. If your vehicle has tires of a different size than the
size indicated on the Tire and Loading Infor-
mation placard or the tire pressure label, you should determine the proper tire pressure for
those tires.
As an added safety feature, your vehicle has
been equipped with a tire pressure monitoring system (TPMS) that illuminates a low tire pres-
sure telltale when one or more of your tires
are significantly underinflated. Accordingly,
when the low tire pressure telltale illuminates,
you should stop and check your tires as soon
as possible, and inflate them to the proper
pressure. Driving on a significantly underin-
flated tire causes the tire to overheat and can lead to tire failure. Underinflation also
reduces fuel efficiency and tire tread life, and may affect the vehicle's handling and stop-
ping ability.
Please note that the TPMS is not a substitute
for proper tire maintenance, and it is the driv-
er's responsibility to maintain correct tire
pressure, even if underinflation has not
reached the level to trigger illumination of the
TPMS low tire pressure telltale.
USA only: Your vehicle has also been equipped with a
TPMS malfunction indicator to indicate if the
system is not operating properly. The TPMS
malfunction indicator is combined with the
low tire pressure telltale. When the system
detects a malfunction, the warning lamp will
flash for approximately a minute and then
remain continuously illuminated. This
sequence will be repeated every time the vehi-
cle is started as long as the malfunction
exists.
When the malfunction indicator is illuminated,
the system may not be able to detect or signal low tire pressure as intended. TPMS malfunc-tions may occur for a variety of reasons,
including the mounting of incompatible
replacement or alternate tires or wheels on
the vehicle that prevent the TPMS from func-
tioning properly. Always check the TPMS mal-
function 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 prop-
erly.
Vehicles with a tire pressure monitor are
equipped with sensors in the wheels that
monitor the tire pressure of all four tires. The tire pressure monitor monitors the pressure
in all four tires; you set this pressure when you
activate the tire pressure monitor. The tire
pressure monitor warns you when the pres-
sure drops in one or more of the tires. The tire
pressure monitor only functions if the corre-
sponding sensors are installed on all wheels.
You should always adjust the tire pressure
according to the vehicle load. Restart the tire
pressure monitor if you change the tire pres-
sure.
The tire pressure monitor does not warn you if a tire pressure is incorrect. Observe the notes
on the recommended tire pressure
(Y page 288).
The tire pressure monitor is not able to warn
you of a sudden loss of pressure, e.g. follow-
ing penetration by a foreign object. In this
event, brake the vehicle until it comes to a Tire pressure
291Wheels and tires Z
Each tire that is affected by a significant loss
of pressure is highlighted in the pressure dis-
play.
Restarting the tire pressure monitor When you restart the tire pressure monitor,
the currently set tire pressure are taken as
reference values for monitoring.
In most cases, the tire pressure monitor
detects the new reference values automati-
cally, 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 val-
ues manually as described here.
Before restarting the tire pressure moni-
tor:
X Set the tire pressure to the value recom-
mended on the Tire and Loading Informa-
tion placard or the tire pressure table on
the B-pillar on the driver's side
(Y page 288).
Observe the notes on tire pressure when
doing so (Y page 288).
X Make sure that the tire pressure is correct
on all four wheels.
Restarting the tire pressure monitor
(vehicles without steering wheel but-
tons):
X Turn the key to position 2in the ignition
lock.
X Press the 0079menu button on the instru-
ment cluster repeatedly until the display
shows the following message:
+CAL- TPMS
+CAL- TPMS
X Press the 0074button on the instrument clus-
ter.
The display shows:
OK TPMS
OK TPMS
The tire pressure monitor activation proc-
ess has begun. The tire pressures meas-
ured 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 restart:
X Press the 0075button or the 0079menu button
on the instrument cluster.
The activation process is canceled auto-
matically if 30 second s elapse without
input.
Restarting the tire pressure monitor
(vehicles with steering wheel buttons): X Turn the key to position 2in the ignition
lock.
X Press the 0080or007F button on the steer-
ing wheel until the standard display
(Y page 187) appears in the display.
X Press the 0063or0064 button on the steer-
ing wheel repeatedly until the current pres-
sure of the individual tires is displayed or
the display shows the following message:
Tire
Tire pres. pres. displayed
displayed after
afterdriving
driving
for several minutes
for several minutes
X Press the 0045reset button on the instru-
ment cluster.
The display shows the following message:
Monitor current tire pressure? Monitor current tire pressure?
X Press the 0081button on the steering
wheel.
The display shows the following message:
Tire pres. monitor reactivated Tire pres. monitor reactivated
The tire pressure monitor activation proc-
ess has begun. The tire pressures meas-
ured 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 restart:
X Press the 0082button on the steering
wheel. Tire pressure
293Wheels and tires Z