.....VERY useful information
My '91 300CE still has R12 system, and after a little R12 was added earlier this year (it had been several years since last needing any). It blows ice cold. Was blowing "cool" before adding 1 lb.
Good a/c is essential in "hotlanta".
Neil, on a scale of 1-10 what would you rate the effective cooling power of R12 vs. R134a?