Thread: W210 '99 E300 HVAC issue
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Old 07-19-2014, 11:30 AM
TMAllison TMAllison is offline
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Join Date: Feb 2004
Location: Walnut Creek, CA & 1,150 miles S of Key West
Posts: 4,874
Its the ECT (coolant temp) sensor.

Try erasing and see if the compressor will start up again. If it does and the code doesn't return the sensor is probably ok and just lost communication due to low voltage.
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Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)
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