Display messages on vehicles withou
tsteering wheel buttons Display messages Possible causes/consequences and
0004 Solutions
...
LIM km/h The speed display flashes.
The vehicle has exceeded the speed se
tfor variable SPEEDTRONIC
or the programmed maximum speed for permanent
SPEEDTRONIC, e.g. on a steep downhill gradient (overrun mode).
X Apply the brakes yourself as required. NO TPMS The
NO message is displayed for 30 seconds. The
TPMS message
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 The
NO message is displayed for 30 seconds. The
TPMS message
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 The
—— message is displayed for 30 seconds. The
TPMS message
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 at the next opportunity and correc titif
necessary (Y page 281).194
Display messagesOn-board computer and displays
X
Read the tire pressure and compare it with
the recommended value on the loading
information table or th etire pressure table
(Y page 278).
X If the tire pressure is too low, increase it to
the recommended value.
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,
chec kthe tire pressure again using the tire
pressure gauge.
X Screw the valve cap onto the valve.
X Repeatt he 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
recommended 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
Information 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
pressure 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 underinflated 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 stopping ability. Please note that the TPMS is not a substitute
for proper tire maintenance, and it is the
driver'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
vehicle 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
malfunctions may occur for a variety of
reasons, including the installation of
incompatible 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.
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
pressure drops in one or more of the tires. The
tire pressure monitor only functions if the
corresponding sensors are installed to all
wheels.
You should always adjust the tire pressure
according to the vehicle load. Restart the tire
pressure monitor if you change the tire
pressure. Tire pressure
281Wheels and tires Z
message. The
000Atire pressure loss warning
lamp in the instrument cluster (Y page 218)
lights up.
The tire pressure is show nin2red rectangles.
The pressure of the tire concerned is shown
in one of the two rectangles (Y page 192).
Additionally, a warning tone sounds.
Each tire that is affected by a significant loss
of pressure is highlighted in the pressure
display.
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
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
recommended on the Tire and Loading
Information placard or the tire pressure
table on the B-pillar on the driver's side
(Y page 278).
Observe the notes on tire pressure when
doing so (Y page 278).
X Make sure that the tire pressure is correct
on all four wheels. Restarting the tire pressure monitor
(vehicles without steering wheel
buttons):
X
Turn the key to position 2in the ignition
lock.
X Press the 0004menu button on the
instrument cluster repeatedly until the
display shows the following message:
+CAL- TPMS X
Press the 000Ebutton on the instrument
cluster.
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 pressure monitor
considers them to be plausible.
If you wish to cancel the restart:
X Press the 000Fbutton or the 0004menu button
on the instrument cluster.
The activation process is canceled
automatically if 30 seconds elapse with no
input.
Restarting the tire pressure monitor
(vehicles with steering wheel buttons):
X Turn the key to position 2in the ignition
lock.
X Press the 0010or0007 button on the
steering wheel repeatedly until the
standard display is shown (Y page 182).
X Press the 0001or0009 button on the
steering wheel repeatedly until the current
pressure of the individual tires is displayed
or the display shows the following
message:
Tire pres. displayed after driving
for several minutes
X
Press the 0007reset button on the
instrument cluster.
The display shows the following message: Tire pressure
283Wheels and tires Z