i have a '95 c-280. Every now and then, very unpredicable, it will misfire badly and lose power. It can happen when first starting up, or it has happened after stopping at a red light, and has even occurred while going down the road at 60mph. All other times it runs great, and problem can be corrected by stopping, turning off the ignition and then restarting the car. May not happen again for a couple of days.

I replaced the entire ignition wiring harness. Plugs are new.
Does anyone have any suggestions or similar experience? Pls advise and thanks for any help.