SL55 AMG, SL63 AMG, SL65 AMG (R230) 2002 - 2011 (2003 US for SL55 and 2004 for the SL65)

SL55/63/65/R230 AMG: Air Conditioning Help Please

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Old 06-05-2022, 06:02 PM
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Just sold my '11 Porsche TurboS cab for an '03 SL55!
Air Conditioning Help Please

I'm hoping that someone can provide me with the A/C Pressure Specs for charging the system. Preferably a pressure/temperature graph or table.

I have DAS, but I can't find the WIS in there? Any guidance there would be helpful too.

Thanks, MK19
Old 06-05-2022, 07:23 PM
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Just sold my '11 Porsche TurboS cab for an '03 SL55!
Just Ran DAS on the A/C system. No faults or codes. Ran the system test in there and got the following values and an ambient temp of about 21C/74F:
Evap Temp 9C, s/b 1-80C
Coolant Temp: 86C, s/b 0-110C
Eng. Speed: 666 RPM, s/b 400-1400 RPM (could the devil be in my idle speed )
Refrig. Pressure: 11.7b s/b 2-33b

The system isn't quite a cold as I feel like it ought to be and that made me think it might need a bit of Freon.
Does the 11.7b Pressure seem like it could be a bit higher to bring the performance up?
Old 06-24-2022, 03:40 PM
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Old 06-24-2022, 11:03 PM
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95 SL600
I believe it is a weight measure for the refrigerant. Anything else is guessing. Evacuate and charge per recommended weight of refrigerant.

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