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The Adaptive Cruise Control will automatically be available again as soon as the radar sensor is
working properly. The message in the instrument cluster display switches off, and the Adaptive Cruise
Control can be reactivated.
Strong reflected radar signals, for example, in multilevel parking structures, can prevent the radar
sensor from working properly.
Objects that cannot be detected
The ACC radar sensor can only detect vehicles that are moving in the same direction as your vehicle.
Objects that cannot be detected by the radar sensor include:
People.
Animals.
Stopped vehicles, such as a broken-down vehicle or a vehicle that is stopped at the end of a traf‐
fic jam.
Vehicles crossing in front of your vehicle.
Oncoming traffic in your lane.
Other stopped objects.
If a vehicle detected by Adaptive Cruise Control turns or changes lanes and there is a stopped vehicle
in front of that vehicle, the system will not react to the stopped vehicle ⇒Fig.125 . If required,
brake the vehicle yourself.
Driving around curves and traffic circles
When driving into a curve and driving out of a long curve, the radar sensor may react to a vehicle in
the next lane ⇒Fig.124 . In such situations, the vehicle might decelerate unnecessarily or not re‐
act to the vehicle in front. In this case, you must either override the ACC by depressing the accelera‐
tor, interrupt the braking procedure by depressing the brake pedal, or press the button on the
multi-function steering wheel ⇒Switching ACC on and off .
Narrow vehicles and vehicles offset to one side
Narrow vehicles and vehicles traveling slightly to the left or right of your vehicle can only be detected
by the radar sensor when they are within sensor range ⇒Fig.124 . This applies especially to nar‐
row vehicles such as motorcycles. If required, brake the vehicle yourself.
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