Looking at getting B6 S4 convertible, looked at a couple last week, and got another one to look at tonight. One thing that springs out is the odd spec on these. I was selling them when they were new, and always told people they needed heated seats, armrest, Bose and DVD Sat Nav as a minimum, to help resale in the future, but seems nobody else advised their customers of spec cling them "right". Anyhow... i will ill be looking at: 1) Spacers, just enough to get the wheels flush to the body. Any sizes or recommended products? 2) Armrest, second hand ones rare as hens teeth these by the look of it. 3) RNS-E, but most seem single DIN so looks expensive and hassle. 4) SmartTOP comfort module, where from? I need/want the simplest, plug n play solution there is! 5) Exhaust, custom or Milltek, who knows? This car will be a toy mainly, so don't want to spend £0000's on it really, but inevitably looks like I will! I know now I could get a cheaper branded sat nav or whatever, but, I think that ruins these cars, OEM all the way on that front.