My 07 328xi wagon likes my wife's W755 just fine. Been a long time since I paired it but if you keep having trouble, drop me a PM and I will go out and do it again and write down the steps...
Musicar Certified audio upgrades
OE-Look Enclosures for F30/F32/F22/etc
Add-A-Sub and Full-Bass Packages
Full Cabin 3W and 4W Upgrades
F10 Enclosure preorder- contact us for details!