I'm thinking about a 98V70R, but I love the Sc-816 in my S70. I don't want to deal with the changer thingy, I just want a simple single disc. Anyway, could I just switch them? The specs on the Volvo website say that my S70 as the SC-816 option with 8 speakers. The specs on the V70R say that it comes standard with 8 speakers.