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All wheels green
System is active and will issue a warning rela‐
tive to the tire inflation pressures stored during
the last reset.
One wheel is yellow
A flat tire or major drop in inflation pressure in
the indicated tire.
All wheels are yellow
A flat tire or major drop in inflation pressure in
several tires.
Wheels, gray
The system cannot detect a flat tire. Reasons
for this may be:
▷ The system is being reset.
▷ Malfunction.
Additional information
The status display additionally shows the cur‐
rent tire inflation pressures and tire tempera‐
tures. The values shown are current measure‐
ment values and may vary depending on
driving style or weather conditions.
Carry out reset
Reset the system after each correction of the
tire inflation pressure and after every tire or
wheel change.
1.
"Vehicle Info"
2. "Vehicle status"
3. "Perform reset"
4. Start the engine - do not drive away.
5. Carry out the reset with "Perform reset".
6. Drive away.
The tires are shown in gray and the status is
displayed.
After driving faster than 19 mph/30 km/h for a
short period, the tire inflation pressures set are
accepted as reference values. The reset is
completed automatically during driving.
After a successfully completed Reset, the
wheels on the Control Display are shown in
green and "Tire Pressure Monitor (TPM)
active" is displayed.
The trip can be interrupted at any time. If you
drive away again, the reset resumes automati‐
cally.
Low tire pressure message
The yellow warning lamp lights up. A
Check Control message is displayed.
▷ There is a flat tire or a major loss in
tire inflation pressure.
▷ No reset was performed for the system.
The system therefore issues a warning
based on the tire pressures before the last
reset.
1. Reduce your speed and stop cautiously.
Avoid sudden braking and steering maneu‐
vers.
2. Identify the damaged wheel. Do so by
checking the tire inflation pressure using
the Mobility System. Correcting the tire in‐
flation pressure, refer to page 175.
3. Repair flat tire with the Mobility System, re‐
fer to page 172, or replace the damaged
wheel.
Required inflation pressure check
message
A Check Control message is displayed.
Check the tire inflation pressure and carry out
a reset of the system.
In some cases, a wheel was changed without
having carried out a reset.
System limits
The system does not function properly if a re‐
set has not been carried out, e.g., a flat tire is
reported even though the tire inflation pres‐
sures are correct.
Seite 98
Controls Safety
98
Online Edition for Part no. 01 40 2 909 903 - VI/13
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