Francis, it is the black electric switch on the front of the throttle body with the 2 wires connected to it. The throttle body is the alloy box with the air control flap in it at the front end of the right hand inlet manifold that the large rubber snorkel from the air cleaner attaches to. It is bakelite or similar. It is not the sort of thing a machine shop could make. We would be dependent on a firm like Bosch to have them made, hence my suggesting we support Tom Hanson. I put the post here for the sake of putting it somewhere, rather than thinking we could have it made ourselves. If we have sufficient interest, the Shop could act as a liason with the Classic Center on behalf of all members in preference to individual members approaching M-B. A MBCCCI Club approach is more likely to get somewhere.
These switches are on all the fuel injected cars from the 1960's. What I don't know is what is the difference between the one on the 280SE (many thousands of these!), the 300SE and the 6.3. If they were the same, we could enlist the aid of the Pagoda group etc. Does anyone know what the difference is? Externally they look the same. Tom tells me the 6.3 switch is unique.
Art