Just a report... S90D HW2 Deivered Dec 2016, 2500 miles, Left car in parking lot, back 30 mins and no AC. Called service (local). She identified 'chiller off' at her end, and had to re-start the car (not just power off at the car). Parked the car, POWERED OFF on control screen, exited. She pressed the magic restart button and AC works again. I was advised new firmware will fix this known issue. Due out on 2/20. But fix works for 24 hours at least (according to her). She did not know if this was 17.5.36 coming or something new.