Hello Michaelh,I purchased a 2017 300 last week 9000 miles the touchscreen seems the loose power intermittently and comes back on randomly loses all settings, like its losing power or something
I just found this out...with car running hold in both red and blue temp control and pressing in the Browser on the control to the right of volume..this opens up touch screen calibrationJust a "Reset to Factory Settings" option. No "screen Calibration" choices. Checked and latest Software update is 17.11.07
and that is good. One is not allowed to speak to a service technician at the dealer; only to the service rep who has the pat answer of," You will have to bring it in". One would think that a simple "yes or no" to the question of "have you heard of this ever happening before?" would be available. I have only experienced this touchscreen problem with video poker machines and a few slot machines in casinos. Maybe a slot tech will tell me the cause. Maybe Harman Kardon can answer the question. I'll keep calling dealer service centers until someone says, " yeah.. we heard of that and "this" is what fixed it".