1989 300ce... I was about to buy it, but expansion valve is leaking.... tech fixes expansion valve..says radiator and condensor are relatively new...a/c now fine. A/C is R-12.

tech believes the evaporator has been replaced because the expansion valve ties into copper tubing on the evaporator side

Do any 1989's have original evaporators with copper tubing...or is this likely a replacement..... I will take the risk if its not totally copper....but don't really want to buy one that has an original evaporator..