You can find some information if you look around on Google
This is for an OEM retrofit
http://www.bimmerfest.com/forums/sho...d.php?t=432037
This is for the Garmin dealer installed option retrofit
http://www.bimmerfest.com/forums/sho...d.php?t=371045
With that being said, it is much easier to use the navigation on a smart phone and place the smart phone in the storage compartment on the top of the dashboard.
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2013 535i - ED, Oct 2012 | Cashmere Silver | Oyster/Black Nappa Anthracite | ZCW | Sirius | Air Blue 80
2008 X3 | Monaco | Sand/Black Light Poplar | ZAP | ZPP | ZCW | Xenon | Rear Fog
1988 Grand Wagoneer | Burgundy | Ghost Flames | 360 ci | Holley carb
BMW CCA #422951
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