You'd need the vin number to check for sure. The alloys are almost certinaly a staggered set from a w202, which aren't original to the car.
I would suspect the dealer doesn't have a clue, as evidenced by them listing nonsense such as "Sports seats", "Folding rear seats", "Traction control" and "Parking aid"
They probably just thought, AMG wheels? it must be an E36.