Nice Car

The Nice Car is a red shiny car that only appears in Sir Ed-a-lot, and Eddy was washing the car and wearing sunglasses to make the kids think that Eddy has a shiny car. The car is a obvious allusion that adults were in the Cul-De-Sac at the same time Eddy was shining it. It's most likely Ed's parents' car because on the bed, there's a Bumper that says AKA-1, and the car had no bumper licensce on it. Ed took it off.

Edd, Eddy, Kevin, Jonny, Plank, Nazz, and Rolf don't have a clue whose car it is. Ed, Sarah, and Jimmy's reaction was never shown or revealed.