Hi! Been following the forum for a long time, decided to join in order to ask this because I'm genuinely stuck... recently I've retrofited rear parking sensors for my 2014 8V, did all the wiring 18 can high, 8 can low, did all the coding, the PDC module did respond and so on, yet when I engage reverse there's no beeping, also the parking aid menu in the mmi is greyed out (unavailable). Anyone has any clue what could possibly be wrong?