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Old 07-27-2000, 07:13 PM
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Join Date: May 2000
Location: Georgetown, MA
Posts: 84
I recently bought a 300E for my daughter. The AC needs to be recharged. I have all the maintenance documentation and it indicates that the system was retrofit to 134A two years ago. However, The adapters are still the R12 fittings. Now I am confused. The system is now empty. I ran a vacuum for 24 hours. Found no leaks. Since the PO may have been charged for a conversion that was never done, I wonder what is (was) in the system. My thought is to pull the compressor , drain and replace oil with ester, vacuum and charge with 134A. Should I flush and with what? I would like to know what other thoughts are on my dillema. I have all the guages, etc. John
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Old 07-27-2000, 09:50 PM
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Join Date: Mar 1999
Location: Suwanee, GA, USA
Posts: 4,712
If you do go with the 134, it will not cool as well as with the 12. This is a fact of life. The systems that are designed for 134 do cool just as good as the 12, but when you convert, you loose capacity. I would find the leak and use 12.

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Benzmac:
Donnie Drummonds
1991 GMC Syclone
ASE CERTIFIED MASTER AUTO TECHNICIAN
SERVICE MANAGER FOR 14 BAY FACILITY
MERCEDES SPECIALIST 8 YRS
PARTNER IN MERCEDESSHOP.COM
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