The moment it exits the dealer, a car's resale value can go down by 30% or more. Cars depreciate very fast. Considering this, it's hard to define them as 'investments' in the traditional sense. But this is not always the case for all luxury vehicles. When a car model reaches collectible status, its value can hold for a long time.

Audi, BMW, Cadillac, Infiniti, Lexus, Lincoln and Mercedes-Benz, and most are likely what you think of as luxury brands because of their reputations, how they're marketed, the features they offer and their price ranges.