Car Problem Reports

Mercedes-Benz S420 Poor idle quality due to oil feed tubes falling into crankcase

Mercedes-Benz S420 Problem
9 Reports
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Model Years Affected: 1994, 1995, 1996, 1997, 1998, 1999

Average Mileage: 50,500 mi (16,000 mi - 85,000 mi)

Oil feed tubes break and fall into the crankcase (engine) and the tappet becomes noisy (ticking), resulting in degraded idle quality. Our technicians recommend replacing all of the tubes at the same time, broken or not.
  • Visitor, , 85,000 mi

    Oil tube ends popped off resulting in lowered oil pressure and ticking noise. Replaced myself with upgraded steel tubes

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