Hello all, I have bee lurking for a few weeks on this site and decided to join due the abundance of information you all seem to have. I recently purchased a 2005 SLK 350 that needed a little bit of tlc and have since made minor repairs such as Break-pads, Rotors,Oil, Filter, and Thermostat. Now The Car runs perfect engine wise. But I have one last project to tackle and that is the Radio... yes.. this radio and this fancy fiber-optic hookup didn't work when i bought the car. And its rather expensive to swap it out it seems. So far I have bought a loop to see if maybe something is wrong with the fiber optics but it seems fine. The radio it self powers on kinda? It flashes with a line across the screen for like 10 seconds then shuts back off. Ill see if i can attach a video of what it does.