I believe you can get the mirror with compass and homelink buttons. It just costs more. Somewhere around $600. Just too expensive for a compass upgrade, IMO.
650i->ED-Mineral Silver-Black with Ruthenium-HUD-Sport-Logic7-Ceramic Tint
535xi->Metallic Black/Black. Sport- Premium- CWP- Nav- HUD- Comfort Access- L7- PDC- Sat- Ipod- Shades- 18" Style 124 wheels/RFT.