I have a 1991 300SL (5 Speed standard). My speedometer doesn't work. I took it to a shop that repairs speedometers, and they told me that they couldn't find anything wrong with it. They thought it may be an electrical problem. I took my car to an electrician and they didn't find any problem. They suggested that the speed sensor was bad. I ordered the sensor and took it to a Mercedes Dealer. No one there knew how to put the sensor in. They called around to other dealers and they didn't know either. They also looked it up in the computer and there wasn't anything there on how and how long it would take. They offered me to give them a open check to fix it, which they said would take maybe 5-10 hours. I decided not to go that way, but I'm still where I started at. I was told that there weren't but a few of these cars were made and not too many people have worked on them. I need help!!! IS THERE ANYONE THAT CAN SUGGEST A REPAIR SHOP, IN THE ATLANTA AREA, THAT CAN WORK ON THIS CAR AND FIX THIS PROBLEM???