300 SL Roadster
From the Super Mario Wiki
The 300 SL Roadster is a sports car manufactured during the 1950's by Mercedes-Benz that appears as a downloadable kart body in the Mercedes-Benz × Mario Kart 8 downloadable content pack available for Mario Kart 8. The emblem is located on the doors. Its stats are identical to the Standard Kart, Prancer, Sneeker, Cat Cruiser, The Duke, and the Teddy Buggy, meaning that this kart has no effect on the driver's stats.
Despite having only one exhaust pipe, the kart has a surprisingly powerful engine sound, likely to reflect its real-life counterpart. Its engine sound is a less extreme version of the Badwagon, with a low-pitched roar when boosted.
Mario Kart 8 / Mario Kart 8 Deluxe
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