The 220 shifter is different than the other MB shifters. Since the 220's don't have a steering lock, they need extra protection. The late model MB's can be taken out of PARK with nothing more than a pen if you know how to do it. The 220's don't share this feature.The 220's have a mechanical solenoid within the shifter that unlocks it when the criteria are met. Faulty stop-lamp switches are a common cause of this problem. If you're stuck try this. While gently pulling the shifter out of park, strike the top of the shift knob with the palm of your free hand. Sometimes this will momentarily jar the solenoid out of the way.