I reused my ring when I replaced the power steering pump last year. Could not locate anything other than the pleated paper, so I reused the old one. I figure as long as it is intact it should be fine.
'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.