You may have an engine wiring harness problem.
All wiring harnesses are bad on M104 engines from '93 to '95.
Do a search on "wiring harness" and you'll have enough to read to keep you up all day and night.
2001 E430, Bourdeaux Red, Oyster interior.
1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".