Working on my CLK 500. The amount of factory foam, jute padding, and other sound deadener is amazing. I have a box of Stinger RoadKill, but I'm not sure I even need it. Anyone here with Mercedes experience? Was any additional sound deadener needed? I plan on putting some on the door skins when I replace the 6.5" in the doors, and maybe some on the rear deck, but everything else seems well covered. What do you guys think?