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Final tire failure
Vibrations or loud noises while driving
can indicate the final failure of the tire. Reduce
speed and stop; otherwise, pieces of the tire
could come loose and cause an accident. Do
not continue driving, and contact your service
center.◀
Tire Pressure Monitor TPM
The concept
The system monitors the tire pressure in the
four mounted tires. The system issues a warn‐
ing if there is a significant loss of pressure in
one or more tires. Sensors in the tire valves
measure the tire pressure.
Notes
Tire damage caused by external influen‐
ces
Sudden tire damage caused by external influ‐
ences cannot be indicated in advance.◀
To operate the system, also note the additional
information and instructions contained under
Tire inflation pressure, refer to page 232.
Functional requirements
The system must have been reset while the in‐
flation pressure was correct; otherwise, reliable
signaling of pressure loss is not ensured.
Reset the system after adjusting the tire infla‐
tion pressure and after changing a tire or
wheel.
Always use wheels with TPM electronics to
ensure that the system will operate properly.
Status display
1.
"Vehicle Info"
2. "Vehicle status"
3. "TPM"
The status is displayed.
Status indicator on the Control
Display
The tire and system status is indicated by the
color of the tires.
A change in the tire inflation pressure during
driving is taken into account.
All wheels are green
The system is active and issues warnings in
case of deviations from the tire inflation pres‐
sures stored last.
"TPM active" appears on the Control Display.
One wheel is yellow
Flat tire or major drop in inflation pressure in
the indicated tire. A message appears on the
Control Display.
All wheels are yellow
▷ Flat tire or major drop in inflation pressure
in several tires.
▷ The system was not reset after a wheel
change and issues warnings when the tire
pressure deviates from the tire inflation
pressures stored last.
▷ A flat tire in one or more tires while the sys‐
tem is being reset.
A message appears on the Control Display.
The wheels are gray
The system cannot detect a flat tire.
Possible reasons for this:
▷ TPM is being reset.
▷ Disturbance by systems or devices with
the same radio frequency.
▷ Malfunction.
Status information
The status control display additionally shows
the current tire inflation pressures. It shows the
actual values read; they may vary depending
on driving style or weather conditions.
Seite 95
Safety Controls
95
Online Edition for Part no. 01 40 2 954 052 - II/15
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