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Thread: Z4 Roadster (E85) wing mirror problem
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Old 01-05-2013, 04:50 PM
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vintage42 vintage42 is online now
BMW CCA 1405
Location: Louisville, KY
Join Date: Jun 2007
Posts: 3,812
Mein Auto: 1997 BMW Z3 1.9 5MT
Originally Posted by edm6214 View Post
... I've always wondered why the mirrors are permanently heated when the car is running - any ideas?...
Mirror defrosting draws too little current and it's expensive to add a switch.
My 2008 Forester LLBean has one switch for heated wiper perches in the windshield, and heated mirrors. The heating elements in the windshield are huge to melt solid ice, and draw a big current when on. They are worth switching off as they are not needed 99.99% of the time.
But heated mirrors just do light duty defrosting, do not do de-icing, don't draw much current, and are not worth switching in the Z3.

Last edited by vintage42; 01-05-2013 at 04:54 PM.
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