Having had my Black Edition SB two weeks I think the biggest disappointment is the Bose sound system. The sound is so flat and lifeless I'm beginning to wonder if it's actually just a standard system with Bose speaker grilles! I thought it would be a step up from the factory fitted Harman Kardon system in my (9 year old) E46 330ci, but it's not even half as good as that. In fact, it's not much better than the standard stereo in my wifes old Passat estate! Yes I can turn it up loud and it remains clear, but there's not much bass at moderate volume levels and even playing with the settings on the head unit doesn't massively improve things. When my mate had a 55 plate S-line with Bose I'm sure it sounded much better than this. Maybe they've "downgraded" it? Have I really got Bose?!! How can I check? What are everyone elses thoughts on it?