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Actions in the event of a flat tire
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
Tire Pressure Monitor may not have been re‐
set. 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.
System limits
Temperature
The tire inflation pressure depends on the tire's
temperature.
Driving or exposure to the sun will increase the
tire's temperature, thus increasing the tire infla‐
tion pressure.
The tire inflation pressure is reduced when the
tire temperature falls again.
These circumstances may cause a warning
when temperatures fall very sharply.
Following a temperature-related warning, the tar‐
get pressures are displayed on the Control Dis‐
play again after a short distance.
Sudden tire pressure loss
The system cannot indicate sudden serious tire
damage caused by external circumstances.
Failure performing a reset
Tires with special approval: the system will not
function correctly if a reset was not performed,
for example a flat tire may be indicated although
the tire inflation pressures are correct.
Malfunction
Message
The yellow warning light flashes and is
then illuminated continuously. A Check
Control message is displayed. It may not
be possible to identify tire pressure losses.
Measure
▷ A wheel without TPM wheel electronics is
mounted: have the wheels checked, if
needed.
▷ A wheel without TPM wheel electronics, such
as an emergency wheel, is mounted: have
the wheels checked, if needed.
▷ Malfunction: have the system checked.
▷ Interference caused by systems or devices
with the same radio frequency: after leaving
the area of the interference, the system auto‐
matically becomes active again.
▷ For tires with special approval: the system
was unable to complete the reset. Perform a
system reset again.
Declaration according to NHTSA/
FMVSS 138 Tire Pressure
Monitoring System
Each tire, including the spare (if provided) should
be checked monthly when cold and inflated to
the inflation pressure recommended by the vehi‐
cle manufacturer on the vehicle placard or tire in‐
flation pressure label. (If your vehicle has tires of
a different size than the size indicated on the ve‐
hicle placard or tire inflation pressure label, you
should determine the proper tire inflation pres‐
sure for those tires.) As an added safety feature,
your vehicle has been equipped with a tire pres‐
sure monitoring system (TPMS) that illuminates
a low tire pressure telltale when one or more of
your tires is significantly under-inflated. Accord‐
Seite 305
Wheels and tires
MOBILITY
305
Online Edition for Part no. 01402666865 - VI/19
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