There's more info on the newer chassis Benz models over at mbworld.org. Not so much technical knowledge and DIY as here, but more owners of newer cars. I think all the technical bulletins are posted as well - look in the 211 forum.

I don't get the impression that SBC is problematic, quite the opposite actually. I think it's fairly pointless - technology for the sake of technology - but it seems to work just fine. Have the brake fluid changed if you don't have records of it being done - about $150 at the dealer.

I bought a 2006 211 recently, and it had the auxilliary battery changed at the last service too. I don't even know where it is or what it does...