Keeps a safe distance, so you can relax. Active Cruise Control with Stop & Go including radar-based approach control warning with Brake Activation provides you with effective support at all times. Radar sensors permanently scan the carriageway, adapting your speed and maintaining your distance from the vehicle ahead. When the road is clear again, the system accelerates automatically. Thanks to approach control warning, you can enjoy a safe drive in any situation – even when Cruise Control is not currently activated. If the vehicle brakes sharply, it first warns you with an optical and then an acoustic signal. If you do not respond by braking, your BMW will react and brake for you.