[W126 Coupe] R12 freon vs R134 issue

[JohnJayKimrey1 at aol.com]

Hello:
The a/c sytem is functioning fine on my 89 sec except the vent temp. isn't  
what it should be (cool air but not cold). I want to have the sys. checked for  
leaks/functionality and recharged with R12 but all but one shop says that I  
have very little choice but to convert to 134 because they  say they either 
can't get the R12 or say it is $100.00 per lb. plus  labor to install making it 
too expensive to maintain a R12 sys.I don't want to  convert to 134 for the 
reasons mentioned on this site but I feel compelled to.  Will someone enlighten 
me on the general availability of R12  to  Repair shops and does the $100.00 
price tag seem reasonable? I think it should  be more like $45.oo/lb..I live 30 
miles from Charlotte N. C. Also, what is R12A  and is it an acceptable 
substitute for R12 and can the two be mixed in the  system.? If I am stuck 
converting what parts are a must change and what parts  are recommended assuming they 
are all now functioning normal.Your valued  inputs are appreciated.
By the way the system was evacuated, new o ring kit installed and recharged  
with R12 in 2004(service record). The car has 80k miles but has been garaged 
for  the last 4 years.I purchased the car last year.
Jay Kimrey



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