Why it's on the list: Fuel; Repairs; Depreciation
Rounding out our list of the top premium used cars to avoid is the Mercedes-Benz S-Class. This sedan is one of the most expensive cars on the list, which makes many of the reasons to avoid buying it used even more valid. The price for fuel will make you cringe as you fill up the tank with premium gasoline. And for a car that doesn't get good gas mileage to begin with, the price just keeps going up. Tied for the most costly aspects about this car are the repairs and depreciation value. Not only are you going to spend a fortune to purchase this car, you're going to spend another one on mechanical bills the moment this car starts to go. Your best bet is to keep up with the maintenance if you do buy it. However, the depreciation value might make you cry when you see just how much money you will lose if you ever go to resell this car. Unless you're in it for the long haul, walk away.