BenzWorld Junior Member
Date registered: Jan 2005
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300SL: rough running, I'm stumped.
I'm in big trouble with my "old" car and hope I can find some help here. This may seem so crazy, you'll think I'm making it up. Here goes ...
1993 300SL. About 105k miles. Runs flawlessly, except ...
Car is no longer a daily driver. If it sits for a few days, this happens: Starts normally. Runs great for perhaps 15 minutes. Then it begins to miss, then to miss badly. After a few minutes of this it will barely keep running, to the point that it can't climb much of a hill.
After about 10 minutes of this, it starts to recover, and in another 5 minutes or so it's back to normal. After this, it stays completely normal and runs fine unless it's left to sit for a few days. Then the same behavior repeats.
Any ideas much appreciated. I'm developing a twitch here.