Climate Control System Problems Due to Wear in Climate Control Buttons Contacts on Mercedes-Benz S420

The climate control system can fail or perform erratically due to internal problems with the climate control button electrical contacts. Replacement of the climate control assembly is commonly required to correct this problem.

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Average mileage: 111,539 (88,546–153,152)
6 model years affected: 1994, 1995, 1996, 1997, more1998, 1999
11 people reported this problem
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Viewing 1 - 4 of 4 problem details
1996 Mercedes-Benz S420 119,000 mi,
Wear of buttn to increase temperature on driver side,wear of button to increase/decreaser fan and wear on button to select upper/middle/lower vents
1994 Mercedes-Benz S420 97,000 mi,
Buttons take several pushes to engage. After a few months of this, the buttons work fine and on first press
1996 Mercedes-Benz S420 88,546 mi,
The button to control the temperature up or down do not work.
The climate control module cuts off and on by itself and sometimes buttons will not work to change to different modes.