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Sorry, I don't have the first alpha digit for the RDCM, SCM and RFA codes.
Seems like a lot of DTC's! The car is a euro-spec (from Germany).. it is still OBDII??
Any help would be much appreciated because the car is in mint condition and this is all that is holding me back right now.
I would check the battery for leakage on the pos post. The old Delco batteries are notorious for leaking on the pc below it. It has listed short circuit codes for numerous relay circuits and control modules on doors, hatch, defrost, heater/ac, etc. If original battery, pull and check computer/wiring below it for damage, replace with new battery and clear all codes.