Battery died at weekend, car radio reset, need code; don't have it. I do have the following info from the back of the stereo:
Code: RN278F20025713
Barcode: 8200152346T0874
Security: T0874
Model: 22DC278/62P

Mark, June 2011

Fantastic!

Thanks very much.

Really appreciate your help!

Mark, July 2011

normaly it is written in the service booklet as a 4 digit code if not contact5 local radio specialists or renault but they charge q2uite highly

shaunbergin, June 2011

mark
code 1145
You must hold at the end to store your code.
IF YOU DONT HAVE ¬ KEY THEN PUSH THUMBWHEEL IN AND SOME HAVE {A¬} KEY

Turn on the radio and the display will show 'CODE'
Use the steering controls for code entry.
Press the [ ¬] button then rotate the thumb wheel for the correct first digit
Press the [ ¬] button then rotate the thumb wheel for the correct second digit
Press the [ ¬] button then rotate the thumb wheel for the correct third digit
Press the [ ¬] button then rotate the thumb wheel for the correct fourth digit
If the correct code is now shown on screen,
press and hold the [ ¬] button for up to 10 seconds to store the code

FOR NO STEERING CONTROL
press the first preset button for the 1st digit,
second button for the 2nd digit
third button for 3rd digit
forth button for 4th digit
then press and HOLD button 6 to store. for 10 seconds

and on some it's hold 5 to store.

hay88, June 2011