Report: Wear in Climate Control Unit Buttons May Cause Climate Control System Failure
Mercedes-Benz SL500 Problem
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.
Visitor, 1996 Mercedes-Benz SL500, 257,000 mi
Auto function button often requires multiple "hit"s before the sysem engages.