At Saturday's 5-series launch party, I overheard a conversation at the membership table about BMWCCANCC's vendor discounts on parts. I always assumed that everybody who gave us anything gave us 10% (aside from BMW of Sterling's 20%-on-Saturday promotion). But what I overheard seemed to say that some dealers give us 25% and even 30%, at least some of the time (on some of the parts).

So, what's the full story? Which vendors give us which discounts?

I felt bringing this up while enjoying Passport BMW's generous hospitality would be uncouth...