Removed the governor from my 91 300D a few years ago. I know the clip was a little hard to get to but I used needle nose plyers and long thin screw drivers. I found the gear broken (plastic). Cost of part was less than $2 before tax from dealer. My car has 1st gear start so it stayed in 1st. Remove the rear crossmember and let trans drop as far as it will. Push the trans as far as posible to the right side of the car and put a block of wood somrwhere to hold it there. Remove the snap ring that holds the gov cover and remove the cover. Try to turn the gov and if it turns than you have found the problem.

It is very important that you keep the gov clean. Also, If the gear is broken or stripped than check the rear pump before you reinstall the gov. The gov gear also drives the rear pump.

That is all I remember from when I had mine out. That was about 5 years ago.

Paul

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84 500 SEL (307,xxx miles)