One more thing, which I'm sure you know, remember to set the temp wheel to MAX hot, and defrost on for the flushings, you want to drain and fill the heater core.
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72
'02 CLK320 Cabriolet - wifey's mid-life crisis
2012 VW Jetta Sportwagon TDI...at least its a diesel
Non illegitemae carborundum.