I Have A 1979 450sl With A V8 Gas Engine. Does Any One Have A Cure For An Eng Miss Under Load After Hot. Plugs Wires Cap And Fuel Filter Been Replaced. After Hot Eng Will Start To Miss Under Load, Getting So Bad Car Will Not Maintain Speed. If You Stop And Shut Down, Then Restart Car Will Run Good For A Minute Or Two. When It Is Missing And Chugging, You Can Also Just Cut The Key Off Then Immediately Back On And It Will Run Good For A Min. Or Two. You Dont Have To Restart The Motor, I Guess The Transmission Is Still Rotating The Eng. When You Do This So It Doesnt Kill The Eng. Help And Thanks