1993 Audi 100CS Q what freon it has: R12 or R134a?

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Old 06-16-2008, 05:24 AM
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Default 1993 Audi 100CS Q what freon it has: R12 or R134a?

The 1993 Audi 100 CS Quattro - what kind of freon does it have? How to find out? Is it indicated in the VIN?
Is iot R12 or R134A?
How and where to get the adapter for low pressure port? The adapters included in eg. R12 to R134a conversion kits do not fit. But I do have a high pressure snap on port on the condenser?

Thanks for help
Old 06-16-2008, 06:48 AM
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Default Bentley says....

15 - Service valve (low pressure)

For A/C refrigerant low pressure switch -F73-
Remove switch -F73- and connect A/C low pressure gauge when checking pressures, discharging, evacuating or charging system

and

17 - Service valve (low pressure)

Connect A/C low pressure gauge when checking pressures, discharging, evacuating or charging system

**********************

F73 is under the plenum tray on the passenger side. #17 is the low pressure port on the the compressor. Bentley has loads more pertinent info.
Old 06-16-2008, 06:49 AM
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Default unless it was converted, it should be R12..

did you remove the low pressure switch.. from what I remember from my 93 the adapter was not needed after the switch was removed..but I could be wrong, its been awhile.
Old 06-16-2008, 08:36 AM
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If the condensor is bumpy on top = R12; If it is flat and smooth = RE134a
Old 06-16-2008, 09:27 AM
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Default Thanks ALL - but how much R134a 600g or 750g?

Thank you ALL.
No freon conversion was done on the car. The top of the condenser is smooth. Therefore by UrS4boy it is R134a.
I found an add for 1993 Audi 100 CS Quattro and went to see it. It had the plate on the front stating that it is R134a. Its VIN # was lower than mine, there fore I must have R134A. Good call UrS4boy.
But that on car label reads 600g +-50 of freon,
while Bentley on p. V87-163 states 750g+-50.
What should I put in?
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