Hey everyone, i have a 94 c280 my issue is at idle i will have a occasional miss. the Rpm will go down to about 300-400 rpm then right back up again, its very very fast. and may only do it once when i stop at a red light. i only notice it if its in gear and i am holding the brake, if its in neutral or park i can only notice if i am really paying attention to it. i have replaced plugs and coils. once you hit the gas it runs great never misses. any help would be great. thanks