Battery – BMW 745i Sedan 2004 User Manual

Page 207

205

Run-flat tires*

You will recognize run-flat tires by a circu-
lar 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 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.
You can find more detailed information on
the Flat Tire Monitor on page

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 to
15 psi/100 kPa:
Approx. 300 miles/500 km

Tire inflation pressure greater than
15 psi/100 kPa:
Approx. 600 miles/1,000 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 vehi-
cle handling such as reduced lane stability,
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 cen-

ter.

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

208

This manual is related to the following products:

745Li Sedan 2004