You can get the front speaker wires behind the radio, you still need find the rear wires at the fader control and extend them up to the radio, then you need to re- hook up the original wires that plugged into the back of the stock radio to the front outputs so the door speakers still work(they are powered off a booster that is in the trunk. You also have to make sure you have the black amp turn on wire hooked up behind the radio.

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The Mercedes Specialists Since 1986