egr gasses turn down

[lee a4]

hi . i have a 2006 a6 2.0 tdi with egr cooler leaking i have tried to blank it off but managment light comes on after about 20 mins driving but did pull alot smoother and more responce. i have vcds but cant get in to the advanced setting to turn egr down as its asking for a 5


5 digit code. anyone know this so i can accsess this feature. iv tried 12233. its no good. any ideas please.