BMW Z4 ROADSTER Owner's Manual page 291

Runflat tires
Safety information
Warning
The vehicle handles differently when a runflat
tire has insufficient or no tire pressure; for
instance, reduced directional stability when
braking, 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.
Maximum speed
You may continue driving with a damaged tire
at speeds up to 50 mph/80 km/h.
Continued driving with a flat tire
Follow the following when continuing to drive
with a damaged tire:
1. Avoid sudden braking and steering maneu-
vers.
2. Do not exceed a speed of
50 mph/80 km/h.
3. Check the tire inflation pressure in all four
tires at the next opportunity.
When the tire inflation pressure in all four
tires is correct, the flat tire monitor may not
have been initialized. In this case, initialize
the system.
Possible distance traveled with a
depressurized tire
The possible distance which may be safely
traveled varies depending on how the vehicle
is loaded and used, e.g., speed, road condi-
tions, outside temperature. The distance trav-
eled may be less but may also be more if an
economical driving style is used.
If the vehicle is loaded with an average
weight and used under favorable conditions,
Online Edition for Part no. 01405A88B63 - VI/23
Wheels and tires
the possible distance traveled may be up to
50 miles/80 km.
Vehicle handling with damaged tires
Vehicles driven with a damaged tire will han-
dle differently, potentially leading to conditions
such as the following:
▷ Greater likelihood of skidding of the vehicle.
▷ Longer braking distances.
▷ Changed self-steering properties.
Modify your driving style. Avoid abrupt steering
or driving over obstacles, for instance curbs or
potholes.
Final tire failure
Vibrations or loud noises while driving can indi-
cate the final failure of a tire.
Reduce speed and stop; otherwise, pieces of
the tire could come loose and cause an acci-
dent.
Do not continue driving. Contact an authorized
service center or another qualified service cen-
ter or repair shop.
System limits
The system could be delayed or malfunction in
the following situations:
▷ A natural, even tire pressure loss in all
four tires will not be recognized. Therefore,
check the tire inflation pressure regularly.
▷ Sudden serious tire damage caused by ex-
ternal circumstances cannot be recognized
in advance.
▷ The system has not been initialized.
▷ When driving on a snowy or slippery road.
▷ Sporty driving style: slip on traction wheels,
high lateral acceleration (drifting).
▷ When driving with snow chains.
MOBILITY
291
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