Given your proficiency in German, and some of the terrific MechE opportunities in Germany (esp. the auto industry), would you have any interest in one of the International Engineering dual-degree programs? These are five-year programs where the fourth year is spent abroad, doing a semester of academic classes at a German university, and a semester in an international internship (which can lead to great career opportunities). The schools offering this kind of program are U of Rhode Island, UConn, U of Tulsa, and U of Arkansas. All would be “safe” admits for you, I think (maybe UConn is more a match), but have strong engineering programs, and the international component can be a great enhancement if it’s a fit. The first three offer multiple language options, whereas Arkansas is German-only. UConn has a specific Robotics major; URI has a minor. Tulsa doesn’t have a specific pathway but launched a new Robotics Institute in 2024; Arkansas has plenty of robotics research too.
Of course, it’s possible that you’ve checked off your HS language requirement and aren’t interested in pursuing it further, but since HS German has become relatively unusual and since the engineering opportunities in Germany are so great, it seemed worth mentioning.