Alfatango1

Hey all fellow MBers, I've recently sold my 380 SL and just picked up a 2002 E320 wagon 4matic. Doing some minor upgrades and need your input. The stereo does not recognize the CD changer even though there are disc in there it says magazines empty. That is fine and I think I want to go aftermarket I had a great Sony unit with Bluetooth in my Volvo Wagon and want to go that route what do you recommend? Also I am going from the 16 inch stock wheels to a 17 inch AMG monoblock what tires would you recommend for semi sport/ comfort?