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Mercedes-Benz E420 Problems

Buttons on temperature control assemblies work erratically due to wear of parts in control head on Mercedes-Benz E420

Problem Description and Possible Solution

Due to wear of mechanical parts in the control head, the buttons on temperature control assemblies work erratically or not at all. These control heads need to be replaced for this concern or when the display screen starts to fade out.
(2 people reported this problem)

Mercedes-Benz E420 Vehicles With This Problem

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Average mileage: (–)
2 model years affected: 1994, 1995
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Brake problem? Or maybe a faulty head gasket cylinder?
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