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Operation
Tires and wheels
̈ Switch on the ignition (୴ page 33).
The standard display menu appears in
the multifunction display (
୴ page 135).
̈ Press button k or j repeatedly
until the following message appears in
the multifunction display:
Run Flat Indicator
active
Reactivation possible: +
̈ Press button æ.
The following message will appear in
the multifunction display:
Tire pres. OK now
?
If you wish to confirm activation:
̈ Press button æ.
The following message will appear in
the multifunction display:
Run Flat Indicator
Reactivated
After a certain “learning phase”, the Run
Flat Indicator checks the set pressure
values for all four tires.
If you wish to cancel activation:
̈ Press button ç.
or
̈ Wait until the message
Tire pres. OK now?
disappears.
Potential problems associated with
underinflated and overinflated tires
Underinflated tire inflation pressure
Underinflated tires can:
ț cause excessive and uneven tire wear
ț adversely affect fuel economy
ț lead to tire failure from being
overheated
ț adversely affect handling
characteristics
Warning! G
The Run Flat Indicator* can only warn you in
a reliable manner if you have set the correct
tire inflation pressures for each tire.
If an incorrect tire inflation pressure was
set, the system will monitor the pressure
according to the incorrect value.
Warning! G
Follow recommended tire inflation pres-
sures.
Do not underinflate tires. Underinflated tires
wear excessively and/or unevenly,
adversely affect handling and fuel economy,
and are more likely to fail from being
overheated.