I've gotten touchscreen unresponsive on average once every week or two for the last 3 years. It comes in waves where I get the error almost every time I get in the car for 1-3 days, then it goes away for 2-4 weeks. Power saving mode was on, always connected was off. After 3 years, my GPS started freezing, so I took the car in to service. They replaced the MCU (which includes touchscreen). After a couple days, replaced touchscreen went black and had to take to service to replace MCU again. New MCUs all had LTE connection whereas old MCU had only 3G. It was a bit faster overall which was nice. They said it was basically an older MCU that still fit 2014 era cars retrofitted with a newer cell modem and possibly a faster CPU. I also noticed rebooting it took longer and holding scrollwheels seemed to reboot the main screen and the steering wheel screen at the same time. It used to be only the main screen would reboot. Unfortunately, touchscreen unresponsive problem remained about as frequent. I thought I might just live with it, but at one point I parked the car for 2 hours and it had lost 10 miles of range when I returned to find touchscreen unresponsive. Service said logs showed the touchscreen had frozen in such a way that it had been draining power. 10 miles of drain in 2 hours?! I'm not sure but maybe it froze with AC on. Now I'm paranoid that will happen somewhere where losing so much range will be a disaster requiring towing. I never had a range loss like that before the first MCU replacement. So I keep bringing the car to service. At one point they saw an error with the steering wheel screen (instrument cluster) so replaced that too. They have replaced the MCU 3 times now and the problem remains. After the last replacement, it got worse in that it would happen almost every time I got in the car. Finally figured out that could be fixed by turning off power saving mode, but that gets me back to touchscreen unresponsive every 2 weeks or so. I haven't seen it happen multiple days in a row like I used to, so behavior has changed a little. It's currently in service again and they're replacing the MCU again... ARGH. All through this process they keep seeing USB errors in the log and asking what I've left plugged in. The only thing I ever plug in is my Samsung Galaxy S6 to charge it, and I rarely leave it in the car when I exit the car. I've tried four or more different USB cables in case the cable itself is somehow causing the problem. I've had the touchscreen freeze with no USB cable plugged in at all, but it usually happens with just a cable and no device plugged in. They say the USB controller is part of the MCU and can't be replaced separately. MCUs that fit my car seem to be becoming rare because this is the second time they've had to wait a week or more for the part. It's conceivable I keep getting 'factory refurbished' parts that each have different problems that weren't really fixed by refurbishing. Or they all have a defect where plugging in certain USB devices will destabilize the MCU so it may freeze even after unplugging the device. The next thing I'm going to try is using only USB cables where just the two charging pins are connected but the data pins are not. That will prevent the phone from ever being seen as a USB device by the car so it can't possibly trigger any sort of issue.