I may need some, I have two cans im going to use to op of the r12 in my 300d. Theres still a little pressure in there so Im thinking I can just dump some in with their oil and the system will work again. As for the sd, Im going to have to make a custom ac thing, probably out of brazing copper pipes. Im not sure though, and Ill need a few cans.

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1981 300SD 512k OM603