Norcold exhaust fan installation

Kiddydoc

Looking for pointers on installation of the exhaust fan kit which I just received from the factory for my 2014 S Max.  Installation instruction diagrams seem pretty clear and I plan to do this myself as my dealer is 5 hrs away.  I have 2 questions re. the install though.    
1. What is the easiest way to detach and remove the existing vent after unscrewing it without damaging the surface of the trailer given the amount of caulking present?
2. What type of caulk should I use when attaching the new exhaust fan vent?

JustJohn

Kdoc, I used a plastic putty knife to gently pry the grate loose. They are available most anywhere that sells paint. According to Ed Kaufman, you can use any good quality silicone caulk.

ScottG

Mine was only sealed with a little bead of silicone caulking, which I easily scraped off once the vent was popped out. I replaced it with the same.

However, somebody else posted recently that their vent was sealed in place with some much more tenacious goop. I'm not sure how they ultimately dealt with removing and replacing that stuff.

Tabaz

I used a small, white plastic putty knife from HomeDepot to break the bead of caulk between the propane stove and countertop.  Worked great without scratching.  Might work equally well on the plastic vent.