hey all-
can you help me with THE ORDER IN WHICH TO DO THINGS?

from what i've been told by a local shop, it seems the compressor and the drier need to be replaced BEFORE the system can be flushed?
and that the system can't be leak tested until i get a good compressor in there?

is that the case, and if so, should i do things in this order:
1. replace the compressor with the salvage one, along with the little green O-rings.
2. replace the receiver drier
3. take the car in to have the system flushed and leak-tested.

also, is my system definitely an R-12 system? based on the attached photo?

Attached Thumbnails

 

__________________
-lee
'83 300CDT (286k)

former proud owner of:
'85 mercedes euro 300TD
'80 mercedes 300TD
'77 mercedes 280e
'80 mercedes euro 250
'82 mercedes euro 250