Active Cruise Control in the BMW 3 Series Touring.
A long journey on the motorway. The BMW 3 Series Touring is cruising at a set speed. It approaches a slower car in the lane ahead, and automatically ACC reduces the Touring's speed. When the vehicle ahead clears the lane, the Touring returns to its previous speed - all without demanding the driver's attention. A short touch on the accelerator immediately disengages the system. (cost option)