BMW 2004 645Ci Bedienungshandbuch PDF herunterladen (Seite 82)

Technology for comfort, convenience and safety

80

Report of a flat tire

The warning lamp lights up in red

and a message appears on the

Control Display. In addition, an

acoustic signal sounds. There is a flat tire

or extensive inflation pressure loss.

1. Cautiously reduce the vehicle speed to

below 50 mph/80 km/h. Avoid sudden

braking and steering maneuvers. Do

not exceed a vehicle speed of 50 mph/

80 km/h

Due to the reinforcement on the

side walls of the run-flat tires,

inflation pressure loss can not usually

be recognized from the outside, refer to

Run-flat tires on page 168.<

2. To continue driving, comply with the

instructions for driving with damaged

tires on page 168.

Malfunction

The warning lamp lights up yellow

and a message appears on the

Control Display. The Flat Tire Moni-

tor has a malfunction or has failed. Have

the system checked as soon as possible.

Active steering*

The concept

The active steering is a system that actively

varies the steering angle of the front wheels

in relation to the steering wheel move-

ments.

When you are driving in the low road speed

range, e.g. in a town or when parking, the

steering angle of the wheels is reinforced,

i.e. the steering becomes very direct.

In the higher speed range, on the other

hand, the steering angle of the wheels is

reduced more and more. This improves the

handling capability of your BMW over the

entire speed range.

In critical situations, the system can make

targeted changes to the steering angle pro-

vided by the driver and thus stabilize the

vehicle before the driver intervenes.

Malfunction

The fixed warning lamp lights up.

The active steering is no longer

operational. In the low speed range,

greater steering wheel movement is neces-

sary. Have the system checked.

If the warning lamp lights up during the first

engine starting following a power supply

interruption, the system must be activated

with initialization.

Initializing system

1. Start the engine

2. With the vehicle stationary, turn the

steering wheel from the straight-ahead

position to the left as far as it will go and

then back to the straight-ahead position

3. Switch off the engine.

When you start the engine again, all the

functions of the active steering are avail-

able once again.

Brake Force Display

The two-stage brake lamps light up in two

stages depending on how strongly you

brake.

> Normal braking:

The brake lamps and the third brake

lamp go on

> Heavy braking and braking with ABS:

In addition, the light area of the rear

brake lamps is enlarged, refer to illus-

tration.

Online Edition for Part No. 01 41 0 157 980 - © 01/04 BMW AG

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