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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio > Red cap underneath my Rear mirror



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      04-21-2015, 10:27 PM   #1
LsuGeaux
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Red cap underneath my Rear mirror

What is this? Fake alarm?
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      04-21-2015, 10:31 PM   #2
VTECaddict
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It's the light for the alarm. If you don't have the alarm, it does nothing. If you have the alarm, it blinks when armed.
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      04-21-2015, 10:57 PM   #3
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Quote:
Originally Posted by VTECaddict
It's the light for the alarm. If you don't have the alarm, it does nothing. If you have the alarm, it blinks when armed.
Just adding to this true statement: it is also a switch between dark and light so that headlights of cars following you at night don't blind you (if car is not equipped with automatic dimming). You have to twist this button, affectively called clown nose here.
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      04-21-2015, 11:00 PM   #4
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The clown nose!

For non-autodim mirrors isn't it also a handle to flip the mirror?
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