I just wanted to say that afetr eight staright weeks the problem seems to have been sorted out.
I admit having been a little nervous (to say the least), but in the end, given the distance and remote location considerations and skipping over the rather abysmal particular instance of the error diagnose process, Meridian have gone to great lengths to solve the problem (after a couple of missed calls they literally sent in a complete replacement kit, basically I now only have the same chasis ....).
I think it's commendable and in the end it shows a real interest in supporting a customer, however remote the location or peculiar the problem.
( Easy for me to write this now that the small ordeal is over

... I do hope I'll not be running into a similar problem anytime soon ...)
On a particular note, both the dealer and mr. Hall (thanks, George C.) spent quite some time on this matter.