In an absent-minded moment I got in my Ponton to just let it roll to a different place in the driveway. When it was time to turn I remembered the steering wheel lock. That is to say, when I turned the wheel there was a loud click and the lock let go. Chalk one up for Stuttgard, the lock still worked, but IMO the locks are very sensitive. Sometimes my 240D won't let me turn the key until I massage the steering wheel.