For the past month or so I've been having an occasional problem where AutoSteer would be unavailable for no obvious reason. Generally it'd be fine for the first 5-10 minutes of a trip, then become erratic. I'd disengage and wouldn't see the AP steering wheel icon on the IC anymore. This would usually happen while driving with sun on the windshield, and never happened at night. Running the wipers wouldn't help, so I knew it wasn't exterior condensation. But some mornings I had to wipe off exterior condensation right over the camera, sometimes when the windshield was otherwise clear. Another clue was that if I was on a long trip with sunny weather, the problem would eventually resolve itself — although sometimes I had to force an IC reboot to help this along. After several exchanges with the Burlingame service center, the only anomaly they could find in the logs was a possible problem with the camera's heater. I was suspicious of this answer at first, because exterior condensation wouldn't explain the behavior I'd observed. Exterior condensation that shouldn't form during my drive, and even if it did the wipers would take care of it. But the other shoe finally dropped when I realized that my car's bad days were always shortly after it had been parked outside on a rainy day. That raised the specter of interior condensation, which seemed to fit pretty well. So I scheduled an appointment. After three days I now have the car back, with a replacement camera. The service report says they also re-calibrated my radar. It's a rainy day today, so tomorrow I'll be watching AP carefully. Lessons learned: If you have similar symptoms, maybe you also have a bad camera heater. Right now Burlingame seems to have a very small number of Tesla loaners available. I was third or fourth in line at 08:00, and didn't get one. After just nine months with my TMS, a BMW 328i felt slow, clunky, and obsolete. I especially detested the beeping media nag screen at the start of most trips. But I liked having an audio source button on the steering wheel. I also enjoyed the handling and the feel of driving a smaller car. The TMS is quite a bit larger than I really want or need. Is my TM3 ready yet? I'm not sure how much Tesla pays to rent extra loaners, but it probably would have been cheaper for Tesla to simply pay for any and all uber or lyft rides that I wanted to take. To work on the front camera, service has to disconnect anything using that extra connector in the microphone enclosure. I had two dashcams attached to that, and they had to call me and get my authorization to disconnect them. This didn't happen until day two, which suggests some potential for improvement. Anyway my advice is to disconnect anything like this yourself, before you drop off the car. It'll save time all around, and naturally the tech might not do things the same way you would. Overall this was a pretty good service experience. Communication from service almost met my expectations. First, I'd like to get a realistic ETA for return of the car. They estimated two days, but slipped by a day to run an overnight test of the new camera's heater. Honestly it seems like a job that could be done in one day, but I'll live. Once they have the car, I'd like a status update before the end of each and every day the car is being serviced. Here they missed the first day, but did ok the second and third days. Of course I'd also like a Tesla loaner with working AP, too — as long as I'm asking. I expect Tesla to send me a service quality survey in the next few days, and I'll try to report as much of this as makes sense. If I don't see a survey request, I'll send it in an email.