In the link I posted, there is a message about near the bottom discussing cleaning the starter replay terminals/connections. On spjohns1's, apparently just the slightest bit of discoloration/corrosion was enough to interrupt the flow of energy to the starter. Cleaning those connections seems to have cured the problem.

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Mike Tangas
'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.