Never had a MB, but I do have a comment about the RWD. I have a 2006 Infiniti G35 6MT coupe that is RWD and it is a !Removed! in the snow. There is no way that I would drive it. In fact, it's the reason we bought the IS 250 so that I would have something to drive in the winter.
If you have a rolling code garage door opener, follow the instructions for the regular garage door openers and then when that fails, do the instructions for the rolling code types. It took me forever (and reading several posts here) to figure that out.