It seems the rear window defrost buttom should be on a 10 minute timer from what I remember. But when I operate mine, it stays on until I shut the car off. (The light on the switch stays on, I am assuming the heat strips are on the whole time)

I read somewhere here, that this is not good.

Anyone have this happen?

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85 300CD Turbo "Das Polluter" 230K sold for $3,000

98 BMW 323is