Drive-off assistant, Flat tire monitor ftm, Nitor – BMW 325xi Sports Wagon 2006 User Manual

Page 71

Drive-off assistant

The drive-off assistant enables you to drive off
smoothly on uphill gradients. It is not necessary
to use the handbrake for this.

Hold the car in place by depressing the
brake.

Release the brake and drive off without
delay.

The drive-off assistant holds the car in
place for approx. 2 seconds after the

brake is released. Depending on vehicle load,
the car may roll backwards a little during this
time span. Drive off without delay after releas-
ing the brake. Otherwise, the drive-off assistant
will no longer hold the car in place after approx.
2 seconds and the car will start to roll back-
wards.

Malfunction

The warning lamps for the brake sys-
tem light up in yellow. The drive-off
assistant has failed. The car will not
be held in place after the brake is

released. Have the system checked as soon as
possible.

Canadian models display these warn-
ing lamps.

Flat Tire Monitor FTM

The concept

The Flat Tire Monitor monitors tire pressures
while the car is being driven. The system
reports any significant loss of pressure in one
tire in relation to another.
If a tire loses pressure, its rolling radius
changes, and this in turn alters the speed of
rotation. This change is detected and is
reported as a flat tire.

Functional requirement

In order to assure the reliable reporting of a flat
tire, the system must be initialized for the cor-
rect tire inflation pressure.

The system must be reinitialized each
time a tire inflation pressure has been cor-

rected or a wheel or tire has been changed.

System limitations

The Flat Tire Monitor is unable to warn
the driver of sudden, severe tire damage

caused by external factors, nor can it identify
the gradual loss of pressure that will inevitably
occur in all four tires over a lengthy period of
time.

In the following situations, the system could be
delayed or malfunction:

System has not been initialized

Driving on snowy or slippery road surface

Performance-oriented style of driving: slip
in the drive wheels, high lateral acceleration

If snow chains are attached

Initializing the system

The initialization is completed during driv-
ing, which can be interrupted at any time.

When driving resumes, the initialization is con-
tinued automatically.
Do not initialize the system while snow chains
are attached.

Operating principle, refer to page

Start the engine immediately before pulling
away, but do not drive off yet.

Lightly push button

1 in the turn indicator

stalk up or down repeatedly until the appro-
priate symbol appears in the display,
accompanied by the word "INIT".

Press button

2 to confirm your choice of the

Flat Tire Monitor.