I have gotten together the part numbers for the o-rings and compressor seal p/n for the a/c system on the 123/126 cars. I'm sure these seals are used on other applications but I am not aware of them at this time. The metal ringed seal that seals the manifold hoses to the AC Delco compressor are AC Delco "kit" number 15-20058. The MB part numbers on all the o-rings that are used for this application are:

140-997-09-45
140-997-08-45
140-997-07-45
140-997-06-45

Sorry, I do not have the quantity needed. I usually just get a handful whenever I need some.

Hope this posting helps someone trying to rebuild and a/c system.

__________________
Jim

When TCane was helping me gather the stuff I need to do my 80 240 ac he got this package from Carlisle Auto Air...
It is part number 100

and includes the following green O-ring seals:
quantity , part number, description

3, 233-750, #6 O-ring
4, 233-751, #8 O-ring
3, 233-752, #10 O-ring
3, 233-753, #12 O-ring
2, 233-859, liquid line O-ring
1, 233-857, Pressure switch O-ring