You have to switch the radi on on and keep it on for an hour or couple. The lenght of time depends on how many failed attempts you've made. Hope that helps, Arthur 88 M5 89 325ix The radio code for my radio wont work, i thought i knew the code and i tried typing it in a couple times and it was the wrong code so i looked in my manual and found the correct code and now i cant get it to work.