Okay...I replaced the master cylinder about an hour ago. I didn't try them out because, I'll install the hoses in the next few days, and didn't want to waste time pumping out the breaks, when I will have to do it again.
I'll write back once I replace the hoses.
'77 300D 387,000 Miles . . .
'69 280S (SOLD)
'79 300CD (SOLD)