The Euro brochure, though expensive to create and print, does show many of the seating options and has a few vehicles pictured. The US combination in 2001, (I have that one), shows some nice pics of M3 seats but for M5 there is nothing to assist in determining how the heritage vs sports seats compare, etc......I think the answer is that the dealer should know all.....well that just is not the case and nothing beats reading about something in the comfort of your own home and then going out to buy.