I bought a 98 CLK320 with an alpine changer in the trunk. The model# of the changer is CHA-S604. I looked in the trunk and saw it was connected to a small rectangular box.

The problem is...when I hit the CD button on the headunit, nothing happens. It's like the changer doesn't exist. The changer has power and there a CD's loaded in it.

Any help would be appreciated.

Thanks,
J