Ive recently upgraded my Sony MP3 fac fit to a DAB version , read all the info regarding changing aerials etc etc
I bought a magnetic mount aerial off fleebay and it sits in the boot (foor) and gives me spot on reception !
Well worth the £11.99 inc delivery !
The aerial sits on the boot floor to the right corner so clear of anything , sticks through the hook eye hole in the carpet and is only 5" high !
Just another thought if your interested .