Poor AC performance Due to Evaporator Temperature Sensor Failure on Mercedes-Benz SL500

Problem Description and Possible Solution

The evaporator temperature sensor can fail, causing the AC compressor not to cycle. If the AC compressor does not turn on, the AC system will not blow cold air. If the compressor is stuck on, the air will be very cold at first, before warming up.

Problem Data
RepairPal Verified
Average mileage: 84,543 (39,000–156,000)
6 model years affected: 1999, 2000, 2003, 2004, more2005, 2006
17 people reported this problem
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"AC Off" light stays on. When pushed, it flashes and comes back on and stays. No cold air at all at any time.