Willy, got your spreadsheet, thanks for the layout. The A & B connectors are from the (becker)car wiring harness. You match the M-Class adpter to the car harness, splice the other wires to the Alpine connector. If you bypass the car amps, are you using the wires connecting through the amps but pulling the power leads to the amps? I thought the E320 has 6 speakers, so the rears and door speakers are split with their own crossovers? Thanks, edge.