I LOVE adaptation. I just built a projection lamp out of an old Philco loctal tube base and a halogen EZK lamp for a good customer.
This isn't my project though Peter. My buddy is a mechanic found the bad switch. He told me it's in a tight place, and I have a feeling that if it's not in the right spot or if the lever is a different length or actuates at a different point in the lever's throw, it may change the limit of one of the actuators. So first choice is the original switch.
I don't know if Mercedes has any or can order them, if they're discontinued, or would take some time to research. My buddy wanted to get at least three just in case others in the system (he said there were like 5 or 6) were bad now or would fail in the future. I was able to pin the exact switch down in a few minutes but ran into the shipping issue.
Thanks for looking.