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      11-28-2012, 05:48 AM   #868
zorglubxx
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Drives: 2010 E91 Touring
Join Date: May 2011
Location: Amsterdam, NL

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I've had a similar situation - a 2010 with business nav. I got the dealer to install the Alpine retrofit. When I got it, the sound was just terrible. I brought it back to the dealer and he fixed it. The problem is that I am not entirely sure what they did. They said they had just missed connecting one cable but I am not sure if that was the truth. In any case it now sounds very nice and a great improvement over the basic kit. So if I were you I would push them on getting this fixed.