I believe it was all W124 cars after 8/92. Do a search-MBDoc looked into this at one point. Had to do with more 'environmentally friendly' wiring insulation that was adapted.
I hope you get a TE-it won't disappoint.
"If everything seems under control, you're simply not going fast enough" --Mario Andretti
1995 E500 street car
1986 Porsche 944 Turbo S track car