I happen to be doing this test (by accident, as I may have a dead glow relay):

Ambient temperature in the mid 70s F today, and the car will start from cold in under a minute. (I am just reticent to exercise the starter that way).

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'83 300 SD
'68 Triumph TR 250 - The only car I ever loved more than the Mercedes; who needs electricity, anyway? - Damn, why did I sell it?!
'59 Jaguar 3.4 'Le Chat Noir' - Damn, why did I sell it?!

It's difficult to make predictions, especially about the future.
- Niels Bohr