Radar sensor
ACC detects driving situations using a radar sensor
at the front of the vehicle. The range of the radar
sensor is up to approximately 120 m (around 400 ft).
WARNING
The intelligent ACC technology cannot overcome
the laws of physics, and functions only within the
limits of the system. Never let the extra conven-
ience tempt you into taking safety risks when driv-
ing. Careless or unintentional use of the ACC can
cause accidents and lead to serious injury. The sys-
tem is not a substitute for the full concentration of
the driver.
x
Adapt your speed and the distance from the ve-
hicles ahead to suit visibility, weather, road and
traffic conditions.
x
Never use the ACC in poor visibility, on steep or
winding roads, or on slippery road surfaces, e.g.
due to snow, ice, wet roads, loose chippings, or
on flooded roads.
x
Never use the ACC offroad or on non-surfaced
roads. The ACC is designed for use on surfaced
roads only.
x
Brake immediately if a brake request is dis-
played on the instrument cluster display or if
the speed reduction by ACC is not sufficient.
x
Brake if the vehicle starts rolling unintentional-
ly, e.g. after a brake request.
x
Be prepared to control the speed yourself at all
times.
Special driving situations
Please refer to
at the start of the chapter on
page 158.
Predictive cruise control system
If the vehicle is equipped with the Dynamic Road
Sign Display function and an Infotainment system
with navigation, ACC can predictively adapt the vehi-
cle speed to detected speed limits and the course of
the road ahead (depending on equipment and not
available in all countries).
Overtaking
If you indicate left (left-hand traffic: indicate right)
to overtake, ACC will accelerate the vehicle and re-
duce the distance from the vehicle in front. Your set
speed will not be exceeded.
If ACC does not detect any vehicle in front after you
have changed lane, ACC will accelerate the vehicle
up to the set speed.
Overtaking assistance is not available in all coun-
tries.
Stop-and-go traffic
ACC can brake vehicles with an automatic gearbox
to a standstill and hold them stationary. ACCremains
active and the instrument cluster display shows
ACC
ready to start
for a few seconds.
On vehicles with Travel Assist, you can extend this
time by continuing to hold the steering wheel.
As long as ACC remains active, the vehicle will move
off again automatically as soon as the vehicle in
front moves off (depending on the vehicle equip-
ment level and not available in all countries).
Extending or reactivating readiness to drive:
— Press the
button.
Vehicles with Travel Assist:
alternatively grasp the
steering wheel again.
Moving off when readiness to drive has ended and
the vehicle in front has already moved away:
— Press the
button or briefly depress the accel-
erator.
ACC remains inactive in the following cases:
— The vehicle is stationary for several minutes.
— A vehicle door is opened.
— The ignition is switched off.
WARNING
If the message
ACC ready to start
is shown on the in-
strument cluster display and the vehicle in front
moves off, your vehicle will move off automatical-
ly. In some cases the radar sensor may be unable
to detect obstacles that are located in the vehicle's
path. This can result in serious injury and acci-
dents.
x
Always check the road ahead before moving off
and brake the vehicle if necessary.
Adaptive Cruise Control
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