Remote system is an upgrade. QUESTION? Why would it take the better part of a day to set the NULL on the 3.0 system? You just level the RV and then set the NULL. Should NOT take more than 15 minutes. 10 minutes to level and the 5 minutes to read and follow the NULL instructions. Doug
PS, the Level NULL is set by the OEM. But, the Dealership should have checked the system in Auto level and then adjusted if not correct. Unless it is way off by visual, most Dealerships will not adjust it as they will not see a minor out of level.