Poor AC performance Due to Evaporator Temperature Sensor Failure on Mercedes-Benz SL550

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.

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Average mileage: 52,000 (52,000–52,000)
3 model years affected: 2007, 2008, 2009
5 people reported this problem
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2009 Mercedes-Benz SL550 52,000 mi,
Purchased my 2009 SL 550 in Nov 2015 with 49k miles. April at 52k, I had to replace 2 motor mounts, AC compressor , AC sensor, AC low pressure house Total P&L $4,000.00 Great looking car, runs great too But, what's the cost of admiration? I didn't expect these kinds of problems until at least 105k+ Makes you wonder about the new slogan. The Best or Nothing.....really? . What ever happen to the Zenith TV slogan...."The quality goes in Before the name goes on! Com'on Mercedes !