S-Class (W140) 1991-1999: 300 SD, S 350TD, 300 SE 2.8, S280, 300 SE 3.2, 300 SEL 3.2, S320, S320L, 400 SE, S420, 400 SEL, S420L, 500 SE, S500, 500 SEL, S500L, 600 SE, S600, 600 SEL, S600L, 500 SEC, 600 SEC

Knock Knock ......

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Old Jun 19, 2007 | 11:01 PM
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Xbenziv's Avatar
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Joined: Jan 2006
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From: So Cali
S 500 W140
Knock Knock ......

Uh Oh! My big body baby is making a disturbing sound from under the drivers side valve cover. Its a Knocking sound that increases as the engine is accelerated. The noise began when my wife shut off the engine and returned a short period later to discover the sound as soon as the engine was restarted. Big baby is in the benz hospital for diagnosis and assessment.

Any suggestions on what the problem is and expense?
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Old Jun 21, 2007 | 08:23 AM
  #2  
pcmaher's Avatar
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Joined: Sep 2005
Posts: 63
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From: Chicago, IL
1995 S600 Sedan
Could be an oil tube came loose. Read this...

http://pages.prodigy.net/jforgione/MB_lifter.html
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