Power to Sony headunit

[ineson]

Probably been asked a million times before but I have just fitted a new Sony headunit to my mk3 and it powers up when the ignition is on and off. I want it to switch off with the ignition if I can. I have tried swapping the red and yellow wires at the back of the unit but that didn't seem to work.

Any suggestions as to how to get the stereo to turn on and off Wight the ignition?

[B-chi]

You'll need to multimeter the cables to see which one is on when the ignition is on and which one isn't.