I once told off a guy with a 84 300D that he was trying to sell claiming it got 40 mpg.

I said back, "That's odd, because if I recall correctly the dealership paperwork that came with my car started that the car should be getting around 25."

Show him the door sticker and then I proceeded to find significant floor panel rust. $4500! yeah right.

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-Typos courtesy of my mobile phone.