I bought my 94 525 wagon month ago, every thing is fine untill today I accidently let the battery die with light on parking and after jump started radio asks for "CODE" I then entered the correct 5 digits #,and it only responsed beep sound and not seeing any change still "CODE", I again left it for an hour according to manual after 3 times enter, then redo the code again NO LUCK!? Any one....