Everyone is making up random stuff including Usher. There’s only so many possible available automobiles.
It wouldn’t be surprising that Reyes knew what Mercedes I purchased. Everything ends up with random brat ass Aliens and the most advanced Mercedes at the Dealership.
That I am, Chauffeur. Someone that owns a S Class and needs to own an S Class for the convenience of a random Alien ass clown. And he doesn’t know if any Aliens are actually qualified or even want to own the S Class coupe.
It would make no sense that any Alien would want to own an S Class coupe. It would make no sense that any Alien would really want to own any automobile.