Tow vehicles and CCC ratings

[Leons_Bad_Side]

I was looking to upgrade my 5er but the unit we were looking at had a higher rating then what my truck would carry. The salesperson,I know I know, tells me that they have a couple of things that they can do and if I have them done there they will re-certify my truck with a new CCC rating. This is one of the biggest RV dealerships in the country. Does this sound right? He mentioned helper bags and spring work. I do use my TV for other uses then RV’ing so I wouldn’t want to degrade it’s ride more then needed. I was curious if the helper bags could be adjustable or what. Just not to familiar with this area of expertise. I do get a bit of sag now that I think air bags could help with but just not sure about the whole recertification thing.