Nuevo Reversing Camera

Hi All,
The excitement is beginning to build now as I expect to pick my new Nuevo ek up in around two to three weeks time.
I have a question about the reversing camera.
when reversing can you see the back of the van or do you have to guess how much further you have to before the sickening crunch of the post behind you. lol

Also, can it be used permantly on (like a mirror).
Kind Regards
Pete

On our Burford I can see the back of the MH but I also have parking sensors. And yes you can use the remote to turn on permanently, or get dealer to change wiring so it permanently on

Thanks Redcar 56, I had it in my head that you wouldn't see the bodywork and as I have to park in some really tight spots where I live and it upsets the neighbours if you back into their car. lol
Parked the once and had literally two inches back and front when I got out, fortunately it isn't always like that.
Is the rear view I.E Always on adequate? 
Pete