[Dodo]

After looking at the 2010 ordering guide and comparing it to the 2009 version I notice the following:

Both come with "Radio BMW Professional (663)", however the 2010 do NOT come with "HiFi Sound System (676)" but instead have "HD Radio (653)".

It appears that 676 is the speaker type and layout, not the radio itself, which jives with what I read in another post (which I can't find now) that said something about loosing speakers (Tweeters?) on the parcel shelf.

I looked at the 'Konfigurator' on BMW Deutschland, since it shows the codes next to the options and 676 only talks about the upgraded speakers, while 677 (Premium HiFi) also mentions the amp and surround capabilities.

It seems like adding something like 676 aftermarket would be relatively easy, and possibly cheaper/better sound quality (BMW charges 540 Euro on the German site) than what comes standard in '09s.

EDIT: 676 shows 110W amp, 677 a 420W.