Poor idle quality due to oil feed tubes falling into crankcase on Mercedes-Benz 400SE

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: 65,000 (65,000–65,000)
1 model year affected: 1992
2 people reported this problem
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1992 Mercedes-Benz 400SE 65,000 mi,
Horrible ticking and shaking