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Old 01-01-2013, 04:40 PM
SonicBoom SonicBoom is offline
Location: Minneapolis
Join Date: Apr 2012
Posts: 279
Mein Auto: 2007 X3
Originally Posted by med View Post
Is there a way to replace the battery without losing any radio settings and having to reintialize the sunroof? I understand from the dealer that the computer data won't be lost.
Yes, There is an item you can plug in the cigarette lighter, and then attach a 9 volt battery to the other end. It'll supply just enough energy to maintain radio settings and etc.

Disclaimer, these things have been around a while. I can't say for sure if it'll be enough to keep your settings and stuff since I am assuming our Bimmers draw more juice, when off, than you average Chevy Beretta.
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