I have installed a new CD player Philips CEM2100 it works but when I turn the car on and off it loses several settings such as:
Volume, eu region for radio (this may be because I haven't fitted the arial) and last playing cd track data.
I have heard that you can swap a few wires around to fix this issue, but dont know which ones.
Here is an image of the wires in my car.
Here is an image of the back of the CD player.