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Old 10-15-2012, 10:58 AM   #118
Busabos77
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Join Date: Jun 2011
Location: NH
Posts: 848
My Ride: 04 Tiag M3 E46
Quote:
Originally Posted by DSilk56 View Post
I think that the difference is that the oval rear view mirror (I have one in mine) is automatically dimming, while the rectangular mirror has manual dimming.
mine dims automatically too...

Found the answer!
Cars built from 2001 - 2003 have ovals, where as all cars 2004+ have the square mirrors. One of the small part quirks of the E46. also square mirrors have bmw assist and oval ones do not.
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