since you have the "phase" 3, it means that some of your hardware is good, such as speakers... however, your symptoms look like you may have loose connector, somewhere in the vicinity of the amplifier or the DSP unit, or, the unit itself is faulty and the fault is manifesting itself when the conditions are "right"... say, when the it is cold outside... or, when it is hot outside... or humid... or no apparent reason... i strongly suspect a cold soldering point somewhere on the amp or radio or DSP motherboard but you might want to start with checking the connections, the wires around the amp plug, to eliminate something obvious, like a short, or a chaffed wire... once you come to conclusion that wiggling the wires does not change the "phases" of playback, i would recommend start searching on google for a guy named "Baris" or "Boris", he is somewhere in UK and he is worldwide known for fixing problem BMW and Range Rover radios... his website link was posted several times somewhere on this forum, try searching for his name... once you find him, email him with your symptoms and the troubleshooting that you will have done by then, and see what he will suggest...