hello, we recently got an ms and my dad wants to replace the head unit with something that can be integrated with a back-up camera. any suggestions on which model to get? and is there a head unit in the market that already comes packaged with the sensors? also, is it possible to install corner sensors in the front bumper with a proximity lighting indicator ala 7-series (sorry, really dont know how else to describe it). but afaik, aside from the beeping sound getting louder as the car gets nearer to an obstacle, there's also a light indicator that turns darker (yellow to red, etc.) that complements the beeping. will really appreciate all the help i can get as i'm really quite clueless with these things