1982 300CD Tranny dtat replacement

Intermitant relay(?) failure produces switching sounds from under the hood (driverside-front &
behind the instrument cluster, after which, radio must be re-pre-set,
suggesting total power loss.
Thanks in advance for any suggestions.
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Most likely it's a loose battery connection. It migth be a bad relay - swap a similar one and see of the trouble follows the relay but my money is on loose battery connections.
Take them off, clean them within an inch of it's life, then reattach them tightly.
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