Thread: Engine Knock
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Old 04-16-2006, 12:22 AM
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86560SEL 86560SEL is offline
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Join Date: Jan 2003
Location: east Tennessee (southeast USA)
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Hello and welcome back. I would not worry too much about it then - hopefully it is just where it set?

I am not too worried about mine now, it has not gotten any worse and as mentioned, power is adequate and it is actually smooth, save for the slight splutter from the exhaust at idle, but this is just my work car that I drive, say, 200 miles per week, if that much.

Seems like there was one interval when mine got worse. I started it once after leaving a market and it started and stalled. I restarted and it idled up to about 2500 rpms and seemed to be a little louder, but it may have been my imagination. One thing that really gets me is why this cars RPMS "races" automatically up to 2500 RPMS on startup, then goes down to about 800 RPMS within a couple of seconds. I know a lot of cars do this, but it seems harsh for those instantly high RPMS before oil is in top of the engine. 2500 RPMS on startup seems extreme - does anyone elses car go that high, or is this normal for a Mercedes?

It reminds me - there is a elderly man at work that gets in his car ( a NEW Buick), starts it and instantly races the engine to at least 4000 RPMS for about 3 seconds then releases the accelerator. Why he does that is beyond me. I cringe everytime I hear that.

Good luck with your car - keep us posted...... Happy Easter!
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2004 Toyota Sequoia Limited 4wd
1991 Lincoln Town Car Executive
1991 Cadillac Sedan DeVille
1988 Mercedes 300SEL
1972 Chevrolet Caprice Kingswood Estate 9-passenger wagon
1973 Pontiac Grand Ville
(Prior MB's: 1974 240D, 1985 380SE, 1984 190D, 1993 400SEL)
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