BMW Z4 ROADSTER Owner's Manual page 295

4. Take your hand away from the jack as soon
as the jack is under load and continue turn-
ing the jack crank handle or lever with one
hand.
5. Make sure that the car jack foot extends
vertically and is at a right angle beneath the
jacking point.
6. Crank the vehicle up until the vehicle jack
has the entire surface on the ground
and the relevant wheel is maximum 1.2 in-
ches/3 cm above ground.
Mounting a wheel
Mount one emergency wheel only, as required.
1. Unscrew the lug bolts.
2. Remove the wheel.
3. Put the new wheel or emergency wheel on
and screw in at least two lug bolts in a
crosswise pattern until hand-tight.
When non-original light-alloy wheels of the
vehicle manufacturer are mounted, the ac-
companying lug bolts may have to be used
as well.
4. Hand-tighten the remaining lug bolts and
tighten all lug bolts well in a crosswise pat-
tern.
5. Turn the jack crank handle counterclock-
wise to retract the jack and lower the vehi-
cle.
6. Remove the jack and stow it securely.
Online Edition for Part no. 01405A88B63 - VI/23
Wheels and tires
After the wheel change
1. Tighten the lug bolts crosswise. The tight-
ening torque is 101 lbs ft/140 Nm.
2. Stow the faulty wheel in the cargo area, if
necessary.
3. Check tire inflation pressure at the next op-
portunity and correct as needed.
4. Re-initialize the flat tire monitor or reset the
Tire Pressure Monitor.
5. Check to make sure the lug bolts are tight
with a calibrated torque wrench.
6. Drive to the nearest authorized service cen-
ter or another qualified service center or
repair shop, then have the damaged tire
replaced.
Emergency wheel
Principle
In the event of a flat tire, the emergency wheel
can be used in place of the wheel with the
faulty tire. The emergency wheel is only in-
tended for temporary use until the faulty tire/
wheel has been replaced.
General information
Mount one emergency wheel only.
Also check the tire inflation pressure of the
emergency wheel in the cargo area regularly,
and correct it as needed.
Safety information
Warning
The emergency wheel has particular dimen-
sions. When driving with an emergency
wheel, changed driving properties may oc-
cur, for instance reduced directional stabil-
ity when braking, longer braking distance,
and changed self-steering properties in the
limit range. There is a risk of accident. Drive
MOBILITY
295
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