Quantity of refrigerant in an S2

[LHD_Kid]

Hi guys,
I was hoping someone would be able to tell me an answer here...
I am in Romania, currently suffering with 38 degrees and no air con...
I know automotive air con specialists as such do not exist here, but many places service fridges, A friend had a 2001 Volvo V40 recharged last week and it works fine (I just don't trust them).
They could find out how much refrigerant to put in a Volvo, but know nothing about my Audi (1991 LHD 3B coupe, with digital climate control type)
It appears to have been converted at some point to R134a, but they need to know the weight of refrigerant to put in after they have evacuated the residual.
Any help would be appreciated.
Thanks
Chris

[coupegt]

my 3B has a small poster in the engine bay stating 1050 grams of refrigerant, but thats for the original R12, not sure if the amount is the same, if youre running R134A

[s2driveruk]

see here:

http://www.s2forum.com/forum/showthread.php?t=16644&highlight=aircon