My best guess is coil wire boots. I believe they are the cause of 95% of all misfire problems on M104 engines (3.2 liter and 2.8 liter engines from 1993-1997).

Your engine has 3 coil wires and 3 high tension leads (each coil wire fires two cylinders).

Replace the coil wire boots or ends under the three coil wires.

__________________
Paul S.

2001 E430, Bourdeaux Red, Oyster interior.
79,200 miles.

1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".