Just reading this 2 year old post.
Do unexplained rattles annoy you when driving along which are less noticeable on smooth road surfaces.
We have only been for 2 outings in our new MH and there is a rattle which I describe as a coin/stone in bottom of glass jam jar...it comes and goes or else maybe I switch off from it.
I even ended up putting in earplugs, which made for a silent smooth drive.
I have tapped and held around dashboard, glove compartment, and even the rail bit of our Remis concertina sliding internal screen blinds.
(Initially saw comment by Eirebus & Fat Controller on Remus blinds where someone asking which blinds best to fit).
I can see a tip here about Velcro but can’t try out till next time we go away.
I hate when there is a rattle you can’t identify...every Mh has something which you live with, come to think of it we used to have one midway back near the habitation door, possibly it was fly screen, or plates in cupboard or in fridge as we could never agree to exactly the source of the sound.