Surely you can identify the Audi A8, BMW 7 Series, Mercedes-Benz S-Class and Porsche Panamera in the collage above.
But can you tell which is which from the inside?
Take a look at the four well-appointed interiors below and give it a shot. But scroll slowly, the answers are at the bottom of the page.
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And if you're still working your way up the luxury ladder, check out our list of the 10 Best Luxury Cars Under $40,000.