Bad wiring on some models

I have a 92 600SEL with a ASR problem. After buying this Mercedes I have learned that Mercedes had trouble with the wiring insulation failing on some model vehicles, including this model. What models and what years did they have this problem, and what wiring system did it effect? Thanks for your information and help.
hixonjoe
I have also learned that you can all kinds of information from website alldatddiy.com
It cost $25.00 for the first vehicle and $15.00 for each additional vehicle.

I messed up that website address, it is alldatadiy.com

hixonjoe