BMW 2004 645Ci Convertible Manual Do Proprietário

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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 
.
<
2.
To continue driving, comply with the 
instructions for driving with damaged 
tires on page 
.
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