On [XXX], after I purchased the vehicle on [XXX] from Mercedes Benz Midlothian with 57,000+ mile, this occurred. I was driving south on [XXX] near Fairfield VA, when the SUV started popping, with the roaring of the wheels. Then the vehicle started to slow down no matter what I did with the gas pedal. I then pulled over to the grassy area of the [XXX] , and the vehicle completed died - like a brick. The engine would not start up at all. Safety: The issues for me are the facts that I was traveling 1:45 minutes from my home and I was almost smashed in the rear-end by the traffic behind me - due to a vehicle that totally STOPPED on the highway with a speed limit of 70 miles an hours - without any warnings. I traded in a 2014 ML350 with 279,000+ plus miles and had no major issues with the SUV it was a charm. Now I am dealing with a HUGE issues after purchasing a 2021 vehicle [in three days]. I do not know what the problems are - as the dealership has not diagnosis the issues during this writing. There are no reports from the police, dealership, or manufacturers, insurance at this time of writing. The only warning lights that I was grant was the power of the SUV left the vehicle totally. Just ridiculous. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)