Why does a new Buick Lucerne smell like rotten eggs?

A new Buick Lucerne may smell like rotten eggs due to a malfunctioning catalytic converter, which can lead to the production of hydrogen sulfide gas. This odor can also originate from the vehicle's fuel system or if the engine is running rich, causing unburned fuel to enter the exhaust. Additionally, certain materials used in the manufacturing process, such as plastics or adhesives, may emit unpleasant odors as they off-gas. If the smell persists, it's advisable to have the vehicle inspected by a professional.