Don't feel too bad about having to replace your throttle actuator .
I had to replace mine, too, for the same reason.
The throttle actuators on 1993-1995 M104 engines and V12 engines seem to suffer from the deteriorating harnesses.
I would not recommend buying a used one as it will suffer from the same fate.
Just bite the bullet and get a new one.
2001 E430, Bourdeaux Red, Oyster interior.
1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".