Why mirrows turn blue during daytime? - Mercedes-Benz Forum

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post #1 of 4 (permalink) Old 12-27-2009, 12:41 PM Thread Starter
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Why mirrows turn blue during daytime?

Hi, a few days ago, I found the side mirrows and rear view mirrow turned blue during in daytime. It never happened before. I googled it. It probably because the mirrow has blue tint or something similar. But why it's blue in the day? Should that only happen when it's dark? Are there something wrong with the car? It's C230. Anybody knows? Thanks.
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post #2 of 4 (permalink) Old 12-27-2009, 01:17 PM
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good question, I noticed that too but never thought to ask.
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post #3 of 4 (permalink) Old 12-27-2009, 02:13 PM
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If sunlight hits the mirror sensor on your inside rear view mirror, it thinks there are bright headlights behind you and dims the mirrors, inside rear view and outside drivers side giving a fairly dark blue tint.

Also, the photochromeric material does have a blue tint to it, so even w/o the dimming function, the mirrors do have a slight blue tint to them. (Not just on mercedes, My silverado has the same tint and acts the same).

Be glad it's blue, not yellow. If the mirror is yellow, the fluid has leaked out and hopefully not damaged your paint, but has damaged your wallet if you want to replace the mirror and have the autodimming function.

Try this experiment. with the engine running, shine a flashlight on the inside rear view mirror light sensor, and you'll see the mirrors shift to blue.


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Last edited by e-420; 12-27-2009 at 02:18 PM.
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post #4 of 4 (permalink) Old 12-29-2009, 04:00 AM
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haha i noticed mine doing the same thing i just figured it was the sun

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