I replaced the fuel filter, air filter and spark plugs late this summer early fall. The car was running smoothly then. And yes I used plugs purchased from the dealer, and all parts came from the dealership!
The engine was never washed down...I only clean the engine with a damp cloth, definitly not damp enough to cause water seapage problems into the cylinders. As for fuel, I usually run Sunoco 94, alternate with every week with 93 Sunuco at a gas station where I know the tanks were repalced 2 years ago. Rarely do I fuel up anywhere else and when I do its with 93 octane fuel.
It started doing this last winter, but it wasen;t as bad as its now. I didn't address the problem because warmer temperatures came around and the vehicle was running fine.
Thanks for the response.
"Damn the torpedos, four bells full speed ahead"
-1987 300E Smoke Silver
-1997 S320 Black on Black
-Soon To be E55 AMG
-27 foot Grady White Offshore Sportfish.