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Measure
1. Check the tire pressure and correct as
needed.
2. Perform a system reset.
If the tire inflation pressure is too
low
Message
A yellow warning light is illuminated in
the instrument cluster.
In addition, a symbol with a Check Control mes‐
sage appears on the Control Display.
Symbol Possible cause
There is a tire inflation pressure loss.
No reset was performed for the sys‐
tem. The system issues a warning
based on the tire inflation pressures
stored during the last reset.
Measure
1.
Reduce the vehicle speed. Do not exceed a
speed of 80 mph/130 km/h.
2. At the next opportunity, for instance at a gas
station, check the tire inflation pressure in all
four tires and correct if necessary.
3. Reset the system.
If there is a significant loss of tire
inflation pressure
Message
A yellow warning light is illuminated in
the instrument cluster.
In addition, a symbol with the affected tire ap‐
pears in a Check Control message on the Con‐
trol Display.
Symbol Possible cause
There is a flat tire or a major loss in
tire inflation pressure.
No reset was performed for the sys‐
tem. The system issues a warning
based on the tire inflation pressures
stored during the last reset.
Measure
1. Reduce your speed and stop cautiously.
Avoid sudden braking and steering maneu‐
vers.
2. Check whether the vehicle is fitted with nor‐
mal tires or run-flat tires.
Run-flat tires, refer to page 307, are labeled
with a circular symbol containing the letters
RSC marked on the tire's sidewall.
Actions in the event of a flat tire
Normal tires
1.
Identify the damaged tire.
Check the tire inflation pressure in all four
tires, for instance using the tire pressure gage
of a flat tire kit.
For tires with special approval: if the tire infla‐
tion pressure in all four tires is correct, the
TPM may not have been reset. In this case,
perform the reset.
If tire damage cannot be found, contact a
dealer’s service center or another qualified
service center or repair shop.
2. Repair the flat tire, e.g., with a flat tire kit or by
changing the wheel.
Use of sealant, for instance from the flat tire kit,
may damage the TPM wheel electronics. Have
the electronics replaced at the next opportunity.
Seite 317
Wheels and tires
MOBILITY
317
Online Edition for Part no. 01402722630 - VI/18
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