Poor idle quality due to oil feed tubes falling into crankcase on Mercedes-Benz 500SEL

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.
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Average mileage: (–)
2 model years affected: 1992, 1993
2 people reported this problem
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