Does anyone have an idea what would cause this car to run smoothly and with full power 2 or 3 days in a row, and then start with a rough idle that does not clear out --- and continuous rough running and missing that day, regardless of the engine temp? I know some one of the dozens of little parts on that engine is sticking or something when the rough running occurs, but cannot figure out what it is. The car is in mint condition, has 98K on it, good oil and gas, etc.etc. -- taken care of extremely well, but I need to find the cause for this errant behavior. Ideas anyone?? Thanks in advance.

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Ben Harrison Carter
1999 Mercedes ML320 87K
1992 Mercedes 300CE 89K
1995 Corvette 29K -- Sold Dec 09
1989 Mercedes 420SEL 99K -- (Sold 4/08)
1968 Mercedes 230S (106K) (Sold 9/06))
1976 Mercedes 450SEL 130K (Just sold - 06)
1961 Mercedes 220Sb (sold years ago)