The cluster glow plug light is not on the same circuit as the glow plugs. It does not tell all. If it's not lit, it could be the bulb, the controller, or wiring/connection in between.

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85 300D turbo pristine w 157k when purchased 167,870 July 2025
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked