Hello, see your Mercedes Benz dealership for what will likely be an in-warranty repair, as long as you're under 50,000 miles.
No clue as to what could have happened; hands on testing is needed.
RepairPal Certified shops can diagnose and repair your 2019 Mercedes-Benz E450. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.