took delivery of my 2017 F150 xlt sport with a 3.5 eco crew cab in oxford white last week. I love it. huge upgrade from my 2010 stx. Well it appears the auto start stop is not working appropriately. Any one have issues with this function? for anyone that doesn't know it automatically comes on with each ignition cycle and there is a button on the dash that will de activate it if you don't want it on. Well when I push my button on the dash it does not illuminate, and sometimes will deactivate and other times it doesn't. Kind of an annoying thing since my truck was 50k and has 250 miles on it. And also any recommendations on under body rust proofing. My 2010 rusted bad here in ohio. I wanting to fluid film it.

 

Sorry to hear your having issues with yours. I haven't had any issues with my 17 3.5 yet. Like you I really like mine, I also plan to spray the underside with fluid film. I've used it on other trucks with good results.