Wheels and tyres
When a standard tyre experiences a
RUN FLAT TYRES
drastic loss of inflation pressure, the rim
of the wheel brings the full weight of the
vehicle to bear on the collapsed sidewalls.
You can barely manoeuvre the vehicle
and the tyre is destroyed.
Principle of operation
Standard tyre
A
Run flat tyres have sturdy, reinforced
sidewalls that support the rim should the
tyre suffer a loss of inflation pressure.
B
What to do if a run flat tyre has
a puncture
C
Due to the run-flat properties of these
tyres, you may not notice any tyre defect.
Your vehicle is equipped with a tyre
pressure monitoring system that alerts
you to any drop in tyre pressure. See
Technical specifications (page 167).
E75207
A
B
C
Wheel rim position with correct
tyre pressure
In the event of a tyre defect:
Wheel rim position with
insufficient tyre pressure
•
immediately slow down to a maximum
speed of 80 km/h (50 mph)
Tyre
•
avoid sudden or erratic braking and
steering manoeuvres and be
especially careful negotiating bends
Run flat tyre
•
•
do not drive more than 80 kilometres
(50 miles) after the defect is detected
B
A
have the defective tyre replaced as
soon as possible.
Replacing run flat tyres
WARNINGS
D
C
Make sure that the workshop is
aware that your vehicle is equipped
with special run flat tyres.
E87667
Never repair or reuse run flat tyres
that are damaged or have been
driven on run flat.
A
B
Wheel rim position with correct
tyre pressure
Wheel rim position with
insufficient tyre pressure
If a run flat tyre has to be replaced, have
the respective wheel rim inspected for
any damage.
C
D
Tyre
Reinforced sidewall
164
English 