When i installed my carllson rims i removed the factory tpms. I tow my brabus behind my motorhome as well and use the screw on sensors for mh and smart which works great. I do have the tpms light on the dash flashing for a short time, then stays on. Causes no problem. Much safer to have the add on sensors when towing. Otherwise, like you said, you don't know if you have a flat or not until everything is destroyed. I also have the magnetic wireless lights so i did not have to screw with the factory wiring. Has worked great for 5 years now. I built a small metal bracket for each side and attached to the trunk storage lid. They are inside and show up well from the outside.