Problem Reports

Mercedes-Benz 400SE

Report: Insulation Degrades on Engine Wiring Harness and Leaves Conductors Exposed

• Radiators Break Due to Degradation of the Plastic Tanks and Fittings
  A coolant leak may develop form the Radiator due to degradation of its plastic components. Repl...

  Common Problems > Mercedes-Benz 400SE

• Faulty Mass Air Flow Sensor Causing Erratic Engine Operation and Poor Fuel Economy
  A faulty mass air flow (MAF) sensor can cause erratic/rough engine operation and fuel economy i...

  Common Problems > Mercedes-Benz 400SE

• Service Cooling System on Older Vehicles Even if Mileage is Low
  The cooling system hoses may fail unexpectedly. The hoses can look good on the outside, but the rubber can degr...

  Common Problems > Mercedes-Benz 400SE

• Poor idle quality due to oil feed tubes falling into crankcase
  Oil feed tubes break and fall into the crankcase (engine) and the tappet becomes noisy (tickin...

  Common Problems > Mercedes-Benz 400SE

• Repair Leaks From Head Gasket/Timing Cover Gasket Before Oil and Coolant Intermix
  Internal and External engine oil & coolant leaks can develop from the head gasket and/or timing cover gasket; these leaks should be repaired before the engine oil and coolant intermix which can re...

  Common Problems > Mercedes-Benz 400SE