...So when I get ready to warm the plugs up to start the car, the dash light starts blinking. Is that a bad relay or do I have a bad glow plug? And this is for a 1980 300SD.

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Current:
'95 E300D 282K
'85 300D - 253K

'11 Subaru Forester


Before:
'97 E420 - 135k
'80 300SD - 269K
'66 200D - ???K