I've had my 2014 Model S P85+(staggered wheels) since 2015. It's been a GREAT car, I'm one of Tesla's biggest fans. I have this one problem that's costed/costing me time and money over and over again. The negative camber on the rear wheels. All I do is drive up and down i-5 every day. I'm not tracking the car, I'm not in the mountains trying to beat my previous time on windy roads, I drive 70mph up and down i-5 in Washington. My problem is the rear negative camber. It absolutely shreds the rear tires somewhere between 15-20k miles, twice it's left me stranded on the side of a busy freeway with a tire that the car destroyed. I've asked tesla multiple times for help, zero response. I'm on my 7th set of tires now at 165k miles and we all know they're not cheap. Most of the gas savings are getting eaten alive by excessive tire wear. I finally bought a set of unplugged camber arms. My local tire shop installed them about 3 months ago and they were great. Then my air suspension got another glitch(5th time since I've owned it) and brought it into my local SC is portland oregon. They had the car for about 30 minutes, brought it back out and refused to look at it because it had "aftermarket parts" on it.... Parts I needed to add because of an ongoing dangerous design flaw. THEN THEY CHARGED ME $200 TO DO THIS!! One comment about the Portland SC, it used to be a jewel, clean, lots of activity, a beautiful area to deliver new cars. They now have the delivery area filled with boxes, it's dirty, the roll up door is bent from being hit, and the glass panels haven't been cleaned in a year. The place has turned into a S-hole. My car interior and door sills are filthy from dirt and gravel, and I got to pay them $200 for making my car dirty. What options do I have? Thanks, again I'm one of Tesla's biggest fans and super dissapointed.