A vehicle driving in front of you is not detected
until it is completely within the same lane as your
If a vehicle driving ahead of you suddenly merges
into your lane, the system may not be able to au‐
tomatically restore the selected distance. It may
not be possible to restore the selected distance
in certain situations, including if you are driving
significantly faster than vehicles driving ahead of
you, for instance when rapidly approaching a
truck. When a vehicle driving ahead of you is reli‐
ably detected, the system requests that the
driver intervene by braking and carrying out eva‐
sive maneuvers, if needed.
When the desired speed is too high for a curve,
the speed is reduced slightly. Because curves
may not be anticipated in advance, drive into a
curve at an appropriate speed.
The system has a limited detection range. Situa‐
tions can arise in tight curves where a vehicle
driving ahead will not be detected or will be de‐
tected very late.
When you approach a curve the system may
briefly report vehicles in the next lane due to the
bend of the curve. If the system decelerates you
may compensate it by briefly accelerating. After
releasing the accelerator pedal the system is re‐
activated and controls speed independently.
In some situations, the vehicle cannot drive off
automatically; for example:
▷ On steep uphill grades.
▷ In front of bumps in the road.
▷ With a heavy trailer.
In these cases, step on the accelerator pedal.
The following restrictions can occur under unfav‐
orable weather or light conditions:
▷ Poorer vehicle recognition.
▷ Short-term interruptions for vehicles that are
Examples of unfavorable weather or light condi‐
▷ Wet conditions.
Drive attentively, and react to the current traffic
situation. If necessary, intervene actively, for in‐
stance by braking, steering or evading.
Driver assistance systems
Online Edition for Part no. 01405A10E93 - VI/20