BMW 745I - Manual (Page 202)

Replacing components
200
Run-flat tires*
You will recognize run-flat tires by a cir-
cular symbol containing the letters RSC on
the side of the tire. They consist of self-
contained tires and special rims. The tire
reinforcement ensures that the tire retains
some residual safety in the event of pres-
sure drop and driving remains possible to
a restricted degree. The vehicle is
equipped with a Flat Tire Monitor or TPM
Tire Pressure Monitor which indicates
punctures.
The reinforcement on the flanks of the
tires means that it is usually not pos-
sible to detect an air loss from outside. <
Flat tire
If you have a flat tire, the indicator lamp
symbol in the Check Control will light up in
red, and a message will appear. In addition,
a gong sounds.
Detailed information on the Flat Tire Mon-
itor or TPM Tire Pressure Monitor can be
found on page
98 or 99 .
Reduce vehicle speed carefully to under
50 mph (80 km/h), avoiding hard brake
applications and steering maneuvers.
If the defective wheel is not recognizable
as such immediately, check the inflation
pressure in all four tires.
For reasons of safety, do not arrange
for run-flat tires to be repaired. Your
BMW center has the information needed
for working with these tires and is equipped
with the necessary special tools.
<
Continuing driving with a damaged
tire
Driving on run-flat tires can continue
depending on the vehicle load and the
severity of the tire damage, at a maximum
speed of 50 mph (80 km/h). You can deter-
mine the possible mileage for continued
driving on the basis of the following general
indications:
> Tire inflation pressure 0 psi/kPa:
With empty vehicle approx. 90 miles
(150 km)
With full payload approx. 30 miles
(50 km)
> Tire inflation pressure 7 psi/50 kPa –
15 psi/100 kPa:
Approx. 300 miles (500 km)
> Tire inflation pressure greater than
15 psi/100 kPa:
approx. 600 miles (1000 km).
Drive reservedly and do not exceed a
speed of 50 mph (80 km/h). In the
case of air loss, you can expect changes in
vehicle handling such as reduce lane sta-
bility, longer braking distances, and
changes in self-steering properties.
<
Battery
Battery care
The battery is 100 % maintenance-free, i.e.,
the electrolyte will last for the life of the bat-
tery when the vehicle is operated in a tem-
perate climate.
For all questions that regard the bat-
tery, please consult your BMW
center. Since the battery is maintenance-
free, the following is for your information
only.
<
Charging the battery
Only charge the battery in the vehicle via
the terminals in the engine compartment
with the engine off. Connections, refer to
Jump-starting on page
203 .
Online Edition for Part No. 01 41 0 157 197 - © 11/02 BMW AG