Two conveniently parked trade-ins inspired me to try out the new Active Parking Assist in our 2012 CLS550. An evolution of Mercedes-Benz parking systems, Active Parking Assist builds on Parktronic, which notifies you when you are close to another vehicle, and the Parking Assist system, which advises you of adequately sized parking spots and how to maneuver into them. Active Parking Assist will now find the spot, turn the wheel and let you know when it is done. All you have to do is click OK and handle the pedals. We must have tried it a dozen times today, approaching from both directions, and it parked us the exact same distance from the curb each time!