2025 Q7 6Cyl, currently with 850 miles. Since first week, maybe once every 2 weeks, press brake pedal and push starter button, but no response. No noise. Dash lights up but no crank, no start. Then will start after 15 minutes sometimes, next day other times. Dealer says no error codes and can’t replicate the problem. Am now afraid to drive. Has anyone experienced this problem? And more importantly, has anyone had it fixed?