Sony CDX-M630 Hi I need the code for this car stereo as lost original paperwork. I now you have. to press about 4 buttons in a certain order, one of which is the "open/close" button

Here Dude try these, they are all 15 codes that Sony used, and most people can enter them one after another till one of them works..GOOD LUCK.

You need to press reset after each attempt.



CODE 1: MODE SOUND OPEN ATT

CODE 2: ENTER OPEN meNU 6

CODE 3: OPEN DISC+ 1 LIST

CODE 4: SEEK- SEEK+ 3 OPEN

CODE 5: OFF 4 OPEN SOURCE

CODE 6: 2 OPEN DSPL SOUND

CODE 7: OPEN 5 ATT SEEK+

CODE 8: DISC- DSPL OFF OPEN

CODE 9: SEEK+ SOUND OPEN ENTER

CODE 10: DISC- LIST SEEK- OPEN

CODE 11: OPEN 4 LIST OFF

CODE 12: DSPL SOURCE OPEN 1

CODE 13: MENU 2 MODE OPEN

CODE 14: 5 DISC+ OPEN ATT

CODE 15: 3 MENU SEEK- OPEN

Cheers
Derek

Does it help?
http://www.sws-solutions.co.uk/radio_coverage_sony.php