AC not working - Mercedes-Benz Forum

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post #1 of 2 (permalink) Old 06-05-2007, 08:43 AM Thread Starter
BenzWorld Junior Member
Date registered: Jun 2006
Vehicle: 1999 Mercedes-Benz CLK430
Location: Kitsap County, Washington
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(Thread Starter)
AC not working

OK, so my AC isn't working on my 99 CLK430.
I read the great post on AC in this forum, watched the video.
I refilled the AC using those techniques:
Connected the bottle, pressure was low, started the car, turned AC on full, shook the bottle gently while adding the coolant.... still didn't get cold.
The thread on here mentioned to check the AC compressor to make sure it is engaged... not sure how to do that, the serpentine belt is always turning the AC pump, not sure how to tell if it is engaged?
Help from anyone is appreciated.

1999 CLK430
2006 Porsche Cayenne S Titanium Edition
1995 Mits 3000 GT VR4 Spyder
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post #2 of 2 (permalink) Old 06-06-2007, 10:40 AM
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To tell if the compressor is turning, watch the middle part of the pulley. If the middle of the pulley is not turning, then the clutch is not engaging. If the moddle part of the pulley is turning, the compressor clutch is engaging.
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