BMW 650i Convertible 2008 - Manual (Page 91)

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Dynamic Drive*
The concept
Dynamic Drive minimizes body roll and opti-
mizes vehicle stability during cornering and
evasive maneuvers.
Dynamic Drive is based on active stabilizers on
the front and rear axles. Suspension compli-
ance adapts to suit driving conditions, varying
from performance-oriented during cornering to
smooth and comfort-oriented when the vehicle
is proceeding in a straight line. During vehicle
operation, the system continuously runs
through closed-loop control cycles lasting only
fractions of a second.
The system assumes operational status each
time you start the engine.
FTM Flat Tire Monitor*
The concept
The Flat Tire Monitor detects a pressure loss in
one tire by comparing the speeds of the individ-
ual wheels during driving.
In the event of a pressure loss, there is a change
in the rolling circumference and therefore the
rotation speed of the corresponding wheel. The
system detects this change and reports it as a
flat tire.
Functional requirement
To ensure the reliable signaling of a flat tire, the
system must be initialized at the correct tire
inflation pressure.
The initialization must be repeated after
every correction of the tire inflation pres-
sure and after every tire or wheel change. <
System limits
The Flat Tire Monitor cannot indicate sudden
severe tire damage caused by outside factors
and does not detect a natural, even pressure
drop in all four tires.
In the following situations, the system could be
delayed or malfunction:
> System has not been initialized
> Driving on snow-covered or slippery roads
> Sporty driving style: slip in the drive wheels,
high lateral acceleration
> Driving with snow chains *
Initializing system
The initialization finishes during driving,
which can be interrupted at any time.
When driving resumes, the initialization is auto-
matically continued.
Do not initialize the system when driving with
snow chains
* . <
iDrive, for operating principle refer to page 16 .
1. Press the button.
This opens the start menu.
2. Press the controller to open the menu.
3. Turn the controller until "Settings" is
selected and press the controller.
4. Select "Vehicle / Tires" and press the con-
troller.
5. Change to upper field if necessary. Turn the
controller until "FTM" is selected and press
the controller.
Online Edition for Part no. 01 41 0 014 242 - © 08/07 BMW AG