Switched 12v and Ground wires

Mercedes » CL-Class » 2000-2006
Problem Description

Changing head units to a modern one. I need to find a 12v power line and a ground wire in the center console. The original head unit removed had a single plug, which when unclipped is the 2 light MOST diode plug and 3 wires that don't seem to have power or ground.Those are the only wires connected to the original head unit.

I'l like to find a ACC switched line and a ground to connect to the new head unit.

Thanks,

Philip