24 Hours of LeMons aficionados agree: Last year’s race at New Hampshire Motor Speedway was one of the best races of the 2011 season.

This year at the Geneva auto show, Jeep will debut three Euro-bound special editions: a Wrangler that will go on sale soon, as well as production-intent Grand Cherokee and Compass “concepts.”

Hit play for an audio recording of a mystery car’s exhaust note, and then share your guesses or get a few hints from other visitors in the comments below. Be sure to check back on Thursday for the answer!