Your engine wiring harness is still a suspect, but so is your throttle actuator.
The wiring harness that I referred to is the harness for the actuator. You cannot buy it separately. It is part of the throttle actuator.
2001 E430, Bourdeaux Red, Oyster interior.
1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".