Right, yesterday I didn't have the code and I took my old radio ( very smart) and installed into the car,
but before than I did it the "CODE" was flashing and sometime showing "0000" and then I could enter any code (even if I didn't have the right one
Today I got one code, I put back the original radio but the "CODE" doesn't flashes anymore
Answering this one requires some more clarification:
1) Did the radio you're trying to activate come with your car?
2) If yes, did the external display work with it when you bought the car?
If you can answer yes to both these questions, it should only be a matter of unplugging the radio,
leave it disconnected for a few minutes, and reconnect it again.
Make sure at least these three connectors are securely fitted when doing so:
c) Remote stalk + display
(You can secure the antenna and any other connectors after you confirm the unit is working)
If you still have problems, answers to the following questions will be of help in assisting you further:
1) What model year is your Scenic?
2) What model name is your radio (e.g. Tuner List, Update List)?