Consumers have filed a total of 3 complaints related to Audi FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL.
When driving with the cruise control on, the vehicle automatically adjusts the speed to the speed limit. On occasion, when driving at freeway speeds, it will pick up the speed limit from a cross street (over or under pass). This happened on a recent trip with the vehicle set at the speed limit of 75, then suddenly and automatically braking because it detected a 45 mph cross street. With most traffic moving at 75 mph, this was extremely dangerous to suddenly brake for no apparent reason with people right behind us. We can no longer us our cruise control because of this. The audi dealership could not replicate this issue. It only happened to us in a small number of circumstances, but was dangerous and frightening when it did. The automatic speed adjust also apparently cannot be turned off. The dealership did mentioned they were aware of another audi vehicle they had seen with the same issue.
Every tim towing a trailer and hitch weight is over 300 lbs ( specification shows 770 lbs max, original audi hitch installed came with the car ) the audi limited pre-sense warning goes on after ~45 min drive with trailer. After that no distance warning or cruse control (adaptive) possible. After removing the trailer - the issue continues. Only solve is a new calibration of radar system at audi dealer (2 days) and same issue returns when towing a trailer again. (happen now 5 times since jan 2020 - when we bought the car) - and we towed 2 different trailers trailer 1 - 350 lbs hitch weight, trailer 2 700 lbs hitch weight - no solve by audi provided
While driving the vehicle on a state highway the audi adaptive cruise assist currently unavailable error message displays and disables the adaptive cruise assist function for random/unknown periods of time. This error has occurred multiple times. Additionally, when using the audi adaptive cruise assist, the vehicle will come to sudden stops when using if a car is in the left turn lane, parallel to the vehicle.