Inside Overtaking Prevention System
Fig. 144
On the instrument cluster display: slower ve-
hicle detected in the left-hand lane (illustration).
If ACC detects a slower vehicle in the left-hand lane
(left-hand traffic: in the right-hand lane), ACC will
brake the vehicle gently within the system limits and
can therefore prevent a prohibited overtaking ma-
noeuvre. The function is active from speeds of
around 80 km/h (around 50 mph), but is not availa-
ble in all countries.
Limits of the ACC
Please refer to
at the start of the chapter on
page 158.
When not to use the ACC
ACC Is not suitable for use in the following driving
situations due to the system limitations. Cancel con-
trol → page 158:
— Driving in heavy rain, snow or heavy spray.
— Driving through road works, tunnels or toll sta-
tions.
— Driving on winding roads, e.g. mountain roads.
— Driving offroad.
— Driving in multi-storey car parks.
— Driving on roads with embedded metal objects,
e.g. railway tracks.
— Driving on roads with loose chippings.
—
Vehicles without Inside Overtaking Prevention
System:
On roads with more than one lane, if oth-
er vehicles are driving more slowly in the overtak-
ing lane.
WARNING
If you use ACC in the above situations, this could
result in accidents and serious injuries as well as
violations of legal regulations.
Delayed response
If the radar sensor is exposed to environmental con-
ditions that impair sensor functioning, the system
may detect this only after a certain delay. For this
reason, any restrictions to functions may be dis-
played only after a delay at the start of the journey
and when driving → page 158.
Objects that cannot be detected
The radar sensor detects only vehicles that are mov-
ing in the same direction or stationary. It does not
detect:
— Persons.
— Animals.
— Crossing or oncoming vehicles.
— Other stationary obstacles.
Stationary vehicles
Fig. 145
Turning and stationary vehicle.
ACCreacts to stationary vehicles to a limited extent
up to a speed of 60 km/h (37 mph), provided a sta-
tionary vehicle is detected and your own vehicle can
be comfortably braked behind the stationary vehicle,
subject to the system limits of the ACC. ACC does
not perform emergency braking.
If a stationary vehicle is hidden behind a vehicle that
has been detected by ACC and this vehicle turns off
the road or changes lane, ACC will react to the sta-
tionary vehicle →
Fig. 145
.
Bends
Fig. 146
Driving through bends.
The radar sensor always measures straight ahead.
For this reason, vehicles may be incorrectly detected
or vehicles driving ahead not detected in tight bends
→
Fig. 146
.
160
Driver assist systems
