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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 358, are labeled
with a circular symbol containing the letters
RSC marked on the tire's sidewall.
3. Read the description on What to do in case of
a flat tire, refer to page 369.
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.
Run-flat tires
Safety information
Warning
Your vehicle handles differently with a run-flat
tire with no or low inflation pressure; for in‐
stance, your lane stability when braking is re‐
duced, braking distances are longer and the
self-steering properties will change. There is a
risk of accident. Drive moderately and do not
exceed a speed of 50 mph/80 km/h.
Warning
Heavy trailers can start swinging when continu‐
ing to drive with a flat tire. There may be a risk
of accident or risk of damage to property. Do
not exceed a speed of 35 mph/60 km/h when
driving with a trailer and a flat tire. Immediately
brake in the case of swinging. Apply necessary
steering corrections as carefully as possible.
Maximum speed
You may continue driving with a damaged tire at
speeds up to 50 mph/80 km/h.
Seite 369
Wheels and tires
MOBILITY
369
Online Edition for Part no. 01402667244 - VI/19
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