Cheap conversion....threaded on 134a nipples onto r12 nipples.
Drew vac on system. Filled w/ 134a & oil mix sold at wallmart. Cold and running well so far (2yrs) in a 78 bmw...cost less than $50.00
My MB came converted...nice and cold so far.


YMMV!

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82 300D....went to MB heaven
90 350 SDL....excercising con rods