It runs pretty well, but the idle is a bit rough, and when it bogs down, I need to floor it to move it...feels like 1/20th of the power. When it bogs down, the rotten egg smell comes.

It only has 47k miles...never changed cap rotors...plugs look good.

Any way to tell if the wire harness is acting up? Does this seem like that?

__________________
1994 E420 43k (pickup, solid)
1990 300D 2.5 127k (sold) (now driven by friend)
1991 300D 2.5 73k (sold) (incredible car)