Vehicle stalled while driving on a highway with power system failure warning. i could not accelerate the car. i had to take the exit since i was luckily in the right lane and close to the exit. car was running on battery only at around 30 mph. i pulled out in the parking lot, turned off power and turned back on and was able to reach home. i took the car to the dealer, they could not diagnose the issue right away and asked me to leave the cardie to drivability issue. they called us back after 2 days and told us that they updated the software. i do not feel safe driving this car. please take necessary action immediately.