2.15.16 was installed on my car this weekend (via OTA, although the service centers are now pushing it during service), and I ran into a curious problem. When my wife hit the button to open the FWD's today, it opened 4-6 inches, then stopped. After that, any press of the buttons (interior, exterior, touchscreen) resulted in three beeps but the door would not move at all. Using touchscreen override (holding the button to open) didn't move the doors. As it turns out, the doors seem to have lost their calibration data. To recalibrate the FWD's: hold the interior door switch down (the direction for "close") and keep holding it. The car will give a single tone, the door will move out about 3-4 inches, then stop, then slowly close until the latch pulls it shut. You can then release the button and the doors should be recalibrated. You can't use the touchscreen -- you must reach around from the driver's door to the switch inside. The doors will not do this recalibration cycle if the doors are already calibrated. Repeat for the other side. After doing this recalibration, the doors worked again - but throughout the day it seems as if the doors lost their data again after a while. The service center suggested that it might be caused by the FWD modules going to sleep. With energy saver to "off" the car didn't lose its data at all (although my sample size was very small here, so it might be something else). I turned it back on before I left this evening, and when I tried again 3 hours later, sure enough the calibration data was lost again. So if you have 2.15.16, and your FWD's stop working, you may want to try turning energy saver off until the bug is fixed.