Well, I picked up my S75 last Friday around noon, while I wait for my M3. Drove it home - no problem. Ran some errands with it on Saturday, about 12 miles - no problem. Early this morning, I decided to drive it to my high desert home and got alarms and alerts on the dash indicating that “Driver Assistance Features Unavailable” about every couple seconds. Worked with Tech Support over the phone this morning (Sunday) troubleshooting the problem to no avail. A flat bed was called to pick up the car. Before the flat bed arrived, I went back out to the car, opened the driver's door and the messages and alarms had stopped. Long story short, the flat bed truck guy, Tesla tech and I agreed the car could be driven.
I drove the car 30 miles to my closest Supercharger. Took the batteries up 90% and drove up the Cajon Pass (Elev. over 4,000') to the high desert - no problem. Made four stops in town and drove to my other home - no problems. Brother came over to see the car. I opened the driver's door and the alerts and alarms came back on. My brother laughed and said; "Great car!"
If this is an example of the QC for a mainstream S, what the hell will the first deliveries of the M3 be like? This is not good. I worried and commented earlier about my concerns for QC. I'm on the west and will be configuring my M3 with most options, including "PXXDL". I presume I would be an early delivery. Hehe, not now I won't. I'll be certainly deferring my one time and let others be the guinea pig. Terrible experience so far and still need to determine how my S75 will get to the nearest service depot 100 miles away. Nobody to talk to on a Sunday. More to come........