I struggled where to place this post. Like many here, I own a Model S and have a Model 3 reserved. I took ownership of my S 75 on the last day of September, last Friday. Did I screw up? On the second day of ownership, I started receiving “Driver Assistance Features Unavailable” (DAFU) errors when powering up the vehicle. Over the weekend, I found telephone support pretty much useless. (If the two button reboot doesn’t work or a complete power down didn’t work, the technician wants to call a flatbed.) While the technician on phone never heard of DAFU errors, they have been very well documented in these forums. Is Tesla’s knowledge-base lacking? The vehicle is still drivable but features like cruise control and Autopilot are disabled, not to mention the constant DAFU error message tones. A couple days later, my local service center in Buena Park, CA tried applying an OTA fix but it did nothing to address the problem. This morning I drove to my other home, the one closest to the service center. I called Tesla’s Service department in Buena Park at 11:45 am and got a recording asking me to leave a message and somebody would call me back. WTF? I guarantee you if I called Mercedes, BMW, Porsche, or even Cadillac, somebody in Service would have answered the phone at 11:45 am. Hell, even Chevy service would have answered the phone (good for potential Bolt owners). I left my message, along with my telephone number and waited. By 1:08 pm nobody had returned my call so I called them again. I got an attendant on the phone and asked her if I could speak to the Service Manager. Naturally, he was “unavailable”. She took my number and said he would call me back. He eventually did around 4:30 pm. That's ok, he's a busy person. What the hell will Tesla service be like when 500,000 M 3s are on the road? Sure, Tesla has to ramp up service but if they can’t efficiently handle a Model S owner’s problem now, how the hell will they handle service issues for all models in 2018? Will Tesla ration service? Will Tesla relegate M 3 owners to the back of the line behind Model X and Model S owners or will Tesla give priority service to M 3 owners that also own other Tesla models? This should be a major concern for current owners and potential owners of any new Tesla, not to mention not being able to speak to a live person in service during the middle of the business day. More to come.