I've had the guys at the dealership reset my airbag light over a dozen times and after about the 4th time, they started giving me a hard time because they knew I was messing with stuff but they knew it was just somethign that got unplugged and they loved the warranty work when they could charge out an hour and it only took 10 minutes. Finally I asked someone at MB why it did that and they gave me the info I posted above. Started doing that and no more airbag light.