All I have to offer you are these 2 links:

http://mercedes.braingears.com/

http://skinnerbox.steaky.org/Service/Library.html

Maybe someone else may have more. Also, in case you didn't already know. Your car is a W124 chassis with the M103 engine.

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1989 300CE Astralsilber/Schwarz
1992 300CE Schwarz/Schwarz