I have some good news - and it's not that I saved a bunch of money by switching to Geico.
My regional contact at MBUSA passed my inquiry along to an S product manager in the head office
(NJ
). That manager consulted with their in house techs as well as the folks over in Germany and both confirmed that the you will be able to have both the iPod integration kit as well as RSE on the W221 at the same time
(once both options are officially available here, of course
). Apparently, the new S' COMAND unit can accept both and you'll choose the separate inputs on the COMAND system with something like "Rear" for the RSE and "Aux" for the iPod Kit. That's very good news for me.
Jeff