I had a problem with the CD player in mine, I took it out, removed the cover, thought maybe it needs freeing up, used to keep jamming and, wouldn't eject the cartridge, I rubbed a pencil over all the slots in the mechanism thinking it would help, then connected it turned it on and the cartridge ejected when, the buttton was pressed, replaced it and operated it from the HU and,It works !. Going to see if I can get the cd player working again. It didn't work when I first got her 2 and a half years ago, took it apart and found a copy cd jammed in it, removed that and it worked great but packed up again at some point as I didn't use it all that often.
I'll look at the door amps/speakers when the weather settles in a week or so.
it worked perfectly, put it all back together all working fine until, one day I ejected the cartridge to change the CDs on replacing it back to square one, jammed again, took it apart again connected it as before ejected, replaced all working again, I did this several times until, I came to the conclusion that it didn't like the cartridge being disturbed, all the time the same CDs were left in it, it worked fine, never did find out why, was going to get a new CD player, they were available at the time for, £180! never got round to it in the end.