hi,
mine had accoustic parking when i got it however i would never retro fit it as with all hatchback cars it seems a waste of time and money as generally where your back window is located is where a hatchback stops, as my stereo is usually up loud i have never heard it anyway!!!!!!!!
having said all that if you have a woman driving it then i suppose they need all the help they can get though it will never stop them obliviously tearing your alloys and tyres along kerbs as they attempt to park.
Don.