I've got a camera with pre-installed gridlines and I'd like to get rid of them. How sure are you that it's just a piece of clear film in front of the ccd, before I go taking my camera apart?
Also, I'll re-emphasise what you've been saying about your kits being only suitable for 2010 model cars onwards - the ones with Connect Premium stereo/satnav systems. My system, which was built & supplied by someone from 'the other place' is exactly as you describe - and it works beautifully. I cannot recommend them highly enough, because, as anyone with a 370 knows, rear visibility is quite dodgy.