I have the MB version SLK 320 diagram and it is basically a detailed version of the Crossfire one, however I'm not able to decipher the pin outs. If you look at the diagrams I posted, it doesn't make sense if you look at the various B+ and Gnd. All I want to do is find the circuit for the 3 bulbs that illuminate the lower half of the instrument cluster. Trying to find a solution to make the LCD's visible during daylight with the top down. I know our car electrical network is quirky, but I'm talking a basic lighting circuit, shouldn't be that hard to discover. If I could find a schematic ot the PC board, I could figure it out. That is like looking for the proverbial "hen's tooth". I have a cadaver instrument cluster, courtesy Brian Hoffman, so I'll have to figure out how to disassemble it to look at the PC board.