BMW 2005 645Ci Convertible Owner's Manual

Active cruise control may brake when you
reduce the stored desired speed; however, the
driver must constantly monitor traffic and inter-
vene if necessary.
When you switch off the engine or ignition,
active cruise control is fully switched off, too,
and any settings you have selected are can-
celed.

Behavior in curves

Because of the limited range of the system, it is
possible that in curves or on the peaks and val-
leys of hilly roads, a vehicle ahead may be rec-
ognized late, or not at all. Therefore, it is up to
the driver to select a speed that is prudent in
view of the curves and terrain of the roadway.

In approaching a curve, it is possible that active
cruise control would react briefly to a vehicle in
the adjacent lane. In addition, the system can
sense if your vehicle is in a curve and may not
accelerate. If your vehicle decelerates in either
case, you can choose to overcome the deceler-
ation by briefly pressing the accelerator pedal.

Driver interventions

Anytime the driver presses down on the
accelerator pedal, any automatic braking

action by the system is interrupted until the
pedal is fully released. After doing this, release
the accelerator and the system again controls
your cruising speed and distance setting. While
driving with activated system, resting your foot
on the accelerator pedal will cause the system
not to brake even if necessary. Be certain that
floormats or other objects on the vehicle floor
do not interfere with movement of the accelera-
tor pedal.

While active cruise control is capable of
braking your vehicle automatically when

you approach a slower vehicle ahead, it is
important to be aware that the ability of the sys-
tem to apply the brakes is also limited, if you are
driving down a steep grade or when you reduce
your desired speed sharply. The system cannot
stop your vehicle. It uses only a portion of brak-
ing system capacity and does not utilize the full
capacity of the vehicle braking system. There-
fore, the system cannot decrease your speed
for large differences in speed between your
vehicle and the vehicle ahead. Examples: during
emergency braking, when you approach a vehi-
cle traveling at a much lower speed than your
own speed such as when approaching a toll
booth or when a much slower vehicle cuts in
front of you at close range.

Whenever active cruise control
recognizes a situation that requires
driver braking because the system
capacity has been reached or has
been exceeded, the system alerts

the driver by flashing this symbol in the instru-
ment cluster and sounding a signal.