Update...
I went back to Belco yesterday and explain my "problem" about the heating element (40.2 ohms). I show them the NHTSA notes (copy from this forum), tested with an ohm meter and the electric formulas. The guy did understand but it was too late to call Dometic. So he called me back today with the answer he got from Dometic. Can you believe that the Dometic guy told him that there was no such 325 watts element vs 355 W and their was only one element available part # 3850644422 and the 0173768037 was and old # and not available anymore (even if I show him this # from the part list of my model RM2652 on the Domectic web site). And too add on, the guy told him that the recall will fix everything because the new thermal protection switch will cut the power if the heating element goes over 325 watts !!! LOL
I said OK, that is enough and he gave me my money back. I took an appointement for next week for the recall and will find what i'm looking for somewhere else. The guy from Belco is just trying to do the best he can and i'm still in good therm with them but don't let me meet the a.. h..e from Dometic... I'm french canadian and sometimes, i can be VERY religious !!! (Eric will understand...) ;)
