Matt L... I think it's funny that every time you mention not having leather you get a hit on "What? A 210 with no leather?"
Benzcouple: Meguiar's makes some really good stuff. I've not tried their leather treatment -- nor the Leatherique mentioned in the Sticky -- but have had good results with Zymol (I usually wait too long to do it, so I use both their cleaner, which is a bit smelly, and then their treatment/conditioner).
How did the Meguiar's product smell? Is it an all-in-one, cleaner, treatment conditioner or just the latter?
Musikmann: I have a friend with an E63...excellent car of course, but the reason I mention it is that his headliner is some sort of synthetic suede. Feels and looks great. I don't know if that's the standard for all the newer 211s but it is pretty great. Of course I don't know how it will look after a couple of years if the driver is tall with greasy hair.
Take care and enjoy the ride,
Greg