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Changing a wheel Run-flat tiresYour BMW Z8 roadster is equipped
with run-flat tires.
The assembly consists of self-support-
ing tires mounted on specially-designed
wheel rims. Special reinforcement
elements support the sidewalls in the
event of pressure loss. Although tire
performance is then restricted, the
vehicle can still be driven on the
deflated tire for a limited distance. Your
vehicle is equipped with a tire pressure
monitor that signals you in case of a flat
tire.
In the event of a flat tire The red indicator lamp on the instru-
ment panel will flash in the event of a
flat tire. In addition, a gong will sound.
Refer to page 67.
Carefully reduce speed to less than
50 mph (80 km/h), avoiding any hard
braking or steering maneuvers while
doing so.
You will still be able to drive approx.
155 miles (250 km) on your run-flat tire,
until you can get to a safe place to park,
a gas station, or to the nearest BMW
center. Under minimum vehicle loading,
it could conceivably last more than
155 miles (250 km).
If you cannot immediately determine
which tire is defective just by looking
at it, then check the tire pressure in all
four tires.Have your BMW center replace
your tires. For safety reasons, do
not have run-flat tires repaired. Your
BMW center has been trained to work
with the run-flat tires and is equipped
with the necessary special tools.<
If necessary, please have your
BMW center switch the tires on
your vehicle from summer to winter
tires, or the reverse.<
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IndexDataTechnologyRepairsCar careControlsOverview
tion, braking pressures and the
vehicle's yaw rate around its vertical
axis.
When the system detects substantial
differences in rotation rates between
wheels, it acts to inhibit uncontrolled
wheelspin by reducing the drive torque
transmitted to the affected wheel(s),
while also initiating selective braking
intervention as needed.
In addition, DSC permanently monitors
the vehicle's current operating condi-
tion and compares it with an ideal
status calculated based on sensor
signals. DSC reacts to deviations from
this ideal status such as incipient
understeer or oversteer by instanta-
neously reducing engine torque to
restore vehicle stability. This strategy
can be supplemented by selective
braking intervention, available at all four
wheels. DSC acts to prevent traction
loss and skids before the situation can
become critical.You may need some time to become
accustomed to this system's interven-
tion. However, it provides optimum
drive force and vehicle stability.
The braking intervention may be
accompanied by sounds specific to
the system.
The safety belt tensioner responds to
severe frontal collisions by tightening
the belt to ensure that occupants
remain firmly positioned in their seats.
A gas-pressure system retracts the
buckle assembly to tension the
shoulder and lap belts within fractions
of a second. This reduces the tendency
to slide under the lap belt.
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Dynamic Stability Control (DSC) Safety belt tensioner
