Car: 2005, A4, B7, S-line saloon. As title. 1. Does anyone know of a rear parking system that can be fitted without having to remove the bumper? Drilling holes for sensors isn't an issue, but from what I've been reading in here the bumper certainly is. 2. Parking Dynamics do a system which is incorporated into the rear number plate. However, all pics of their system show them mounted in a bumper recess, not the boot recess, as is the case in the B7. I asked PD if this would be okay and their answer was: "might not recognize low objects". So, to get to the point: Has anyone on here fitted this system?