I am presuming you mean the Silver (as in picture) panel on the front of the van.
If yes, then they are fixed on with 'Torx' bolts. My kit says '10', size to remove.
There are four bolts on the top of the panel, two near the bottom front of the panel, and four
along the bottom underside of the panel.
There is a very good chance the bottom row of bolts have rusted up, so plenty of WD-40 before
you try to remove them, same might apply to the other bolts, so be careful trying to take
them out.
I seem to remember there are also some clips somewhere which need a good pull to disengage.
Also when off the van, the top and bottom panels seperate so you are left with the silver part
and the black lower grill.
I replaced the silver panel a few years ago and think I got the replacement from Coastal Motorhomes
but fading memory so could be wrong.