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2015 Mercedes-Benz SL-Class Review

The 2015 Mercedes-Benz SL ranks in the middle of the luxury sports car class. It features an opulent cabin, a powerful engine lineup, a cushioned ride, and composed handling. However, it has astronomical ownership costs, and many of its rivals offer better performance.

Pros & Cons

  • Quick acceleration
  • Smooth ride
  • Lavish interior



  • High ownership costs
  • Not enough steering feedback




Critics' Rating: 9.0
Performance: 8.2
Interior: 8.6
Total Cost of Ownership: 5.4
This model has never been fully tested for safety. Its overall score is being calculated without safety.
J.D. Power Ratings Logo

2015 Mercedes-Benz SL-Class Overview

Is the 2015 Mercedes-Benz SL a Good Used Car?

The 2015 SL convertible is a good used luxury sports car. There's plenty of space in its luxurious cabin. It features a long list of standard equipment that includes heated front seats and leather upholstery. The SL's base engine has lots of power, and there are several stronger engines to choose from. However, while this Mercedes is fairly sporty, the ride is tuned more for comfort than outright handling prowess, so it may not be as fun to drive as some rivals.

Why You Can Trust Us

We’ve analyzed 16 Mercedes-Benz SL reviews, as well as performance specs, interior dimensions, fuel economy ratings, and more, to give you all the information you need to make a smart car-buying decision.

U.S. News & World Report has been reviewing cars, trucks, and SUVs since 2007, and our Best Cars team has more than 75 years of combined automotive industry experience. To remain impartial, we do not accept extravagant gifts from automakers, and an outside source handles our advertising.

How Much Is the 2015 Mercedes-Benz SL?

Based on listings for the 2015 Mercedes-Benz SL on our site, the average price is $54,600, which is below average for the class. Prices range from $39,500 to $85,000 and vary depending on the vehicle’s condition, mileage, features, and location.

See the Best Used Car Deals »

How Much Does the 2015 Mercedes-Benz SL Cost to Own?

The 2015 Mercedes-Benz SL's five-year costs for gas, insurance, repairs, and maintenance are projected to be about $54,670, or $10,934 per year. That's well above average for a luxury sports car.

Is It Better to Buy a Used or New SL?

The 2019 Mercedes-Benz SL is much pricier than used 2015 models. The new SL starts at $89,150, and it differs from the 2015 in a few significant ways. The 2019 benefits from the refreshed exterior styling of the 2017 redesign. Unlike the 2015 SL, the 2019 comes with Apple CarPlay, Android Auto, and a nine-speed automatic transmission as standard equipment. The new model is certainly worth a look, but the 2015 SL could save you a lot of money without making you sacrifice a great deal in terms for features.

Read about the new Mercedes-Benz SL »

There are quite a few new luxury sport cars that cost about the same, or less, than the average 2015 SL. For example, the 2019 Audi TT starts around $44,900 and features a premium cabin, precise steering, and a user-friendly infotainment system. The 2019 Chevrolet Corvette starts at $55,900, and it's one of the most well-rounded luxury sports cars you can buy.

See the Best New Car Deals »

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Which Model Year of the Mercedes-Benz SL Is Best?

The 2015 SL is part of a generation that spans the 2013 through 2019 model years. There have been few changes over the years. For 2017, the SL got a redesigned exterior, available smartphone integration via Android Auto and Apple CarPlay, a standard nine-speed automatic transmission, and more horsepower in the SL 450 trim. We recommend opting for the 2017 SL. It has all the amenities of the 2019 model, but at a fraction of the cost.

Compare the 2015, 2016, and 2017 SL »

How Reliable Is the 2015 Mercedes-Benz SL?

The 2015 SL has an above-average reliability rating of four out of five from J.D. Power.

Read more about SL reliability »

2015 Mercedes-Benz SL Recalls

As of this writing, there are two safety recalls for the 2015 SL. The first relates to a potential loss of electric power steering assist, and the second one addresses improperly adjusted low-beam headlights. Before buying any used vehicle, make sure all recalls have been addressed.

See more information on Mercedes-Benz SL safety recalls »

Which Used Mercedes-Benz SL Model Is Right for Me?

The 2015 SL comes in four trims: SL 400, SL 550, SL 63 AMG, and SL 65 AMG.

The base SL 400 trim has a powerful V6 engine and enough features to satisfy most shoppers. It comes standard with the COMAND infotainment system, a 7-inch display, 11 speakers, Bluetooth, satellite radio, a USB port, HD Radio, and navigation.

The SL 550 ups the ante with a V8 engine, ventilated and massaging front seats, active park assist, parking sensors, and a rearview camera. It also comes with an Airscarf system that helps keep you nice and toasty on those chilly autumn nights when you drop the top. Think of it as a heating system for your neck and shoulders.

There are also two performance-oriented AMG models. The SL 63 AMG trim features an even stronger V8 engine, an active suspension, high-performance brakes, a limited-slip differential, and upgraded leather seats. The SL 65 AMG trim includes a V12 engine, adaptive cruise control, lane keep assist, blind spot monitoring, a night vision camera, a Magic Sky Control roof, and a Bang & Olufsen audio system.

See 2015 Mercedes-Benz SL trims and specs »

What Does Mercedes-Benz's Certified Pre-Owned Warranty Cover?

Mercedes-Benz offers a certified pre-owned program for vehicles six years old or less and with fewer than 75,000 miles. Eligibility is determined by the vehicle’s initial sale date. Mercedes-Benz certified pre-owned vehicles come with the balance of the original four-year/50,000-mile new-car warranty, plus an additional one-year/unlimited-mileage warranty. This warranty can be renewed for a fee. If the new-car warranty has expired, you’ll receive the one-year warranty with unlimited mileage. Every Mercedes-Benz CPO vehicle must pass a 165-point inspection.

If you’re unsatisfied with your CPO vehicle, Mercedes’ Exchange Privilege program allows you to exchange it for another CPO vehicle of equal or lesser value within seven days or 500 miles. Additional benefits like towing and 24-hour roadside assistance may be available, so read the Mercedes-Benz warranty page carefully.

Among luxury car manufacturers, Mercedes-Benz’s CPO program is about average. It’s better than BMW’s but not as robust as Jaguar’s or Lexus’, according to our analysis.

See the best CPO programs »

How Safe Is the SL?

Neither the Insurance Institute for Highway Safety nor the National Highway Traffic Safety Administration has crash tested the 2015 SL.

No advanced safety features come standard in the 2015 SL. You may find some used models with blind spot monitoring, lane keep assist, driver drowsiness monitoring, parking sensors, a rearview camera, and a night vision camera.

See SL safety scores »

2015 Mercedes-Benz SL Versus the Competition

Which Is Better: 2015 Mercedes-Benz SL or 2015 Mercedes-Benz SLK?

The 2015 Mercedes-Benz SLK has a lot in common with the SL, including the same good reliability rating, nearly identical features lists, and composed handling. The SLK's engines aren't as strong as the SL’s, and the SLK interior is less refined. However, the SLK won’t cost you nearly as much to maintain as the SL. Unless you just want the additional horsepower, go with the SLK.

Which Is Better: 2015 Mercedes-Benz SL or 2015 Porsche 911?

The 2015 Porsche 911's average price is nearly double that of the SL, but there’s no denying its performance chops. In addition to its powerful lineup of engines, the 911 tackles corners better than most in the class. It also features a luxurious cabin filled with lots of standard and available features, and its fuel economy is great for the segment. If you’re looking for a more engaging driving experience than the SL offers, the 911 is one car to seriously consider.

Compare the SL, SLK, and 911 »

2015 SL Performance

How Does the 2015 Mercedes-Benz SL Drive?

The base SL 400 is powered by a 329-horsepower twin-turbocharged 3.0-liter V6 engine that has lots of power for your daily commute. However, those yearning for even more power have loads of options. Step up to the SL 550, and you'll get a twin-turbo 4.7-liter V8 that makes 429 horsepower. The SL 63 AMG comes equipped with a twin-turbo 5.5-liter V8 with 577 horsepower, and the SL 65 AMG has a twin-turbo 6.0-liter V12 with 621 horsepower. The first two engines come with a seven-speed automatic transmission, and the last two engines feature a special seven-speed transmission that delivers quicker shifts.

This Mercedes rides comfortably and has composed handling with minimal body lean thanks to its standard adaptive suspension system. It also has an available Active Body Control real-time suspension that adjusts based on sensors that evaluate road conditions. However, this roadster's suspension balances ride quality and handling fairly evenly, but its steering offers little feedback from the road. This means that, while the SL is still enjoyable to drive, it isn't as athletic and engaging as many of its class rivals.

Does the 2015 Mercedes-Benz SL Get Good Gas Mileage?

The base SL 400 delivers up to 20 mpg in the city and 28 mpg on the highway, which is about average for the class. The SL 550 models gets 3 less mpg in the city and on the highway.

Read more about SL performance »

2015 SL Interior

How Many People Does the 2015 SL Seat?

There's seating for two people in the SL. Both rows have a good amount of head- and legroom, and the standard power-adjustable seats and power tilt-and-telescoping steering wheel make it easy for the driver to find a comfortable driving position. Sun-reflecting leather upholstery and heated seats are also standard. Massaging and ventilated front seats are available. You can even get an Airscarf heating system that blows warm air on your neck to keep you warm when you have the top down in chilly weather.

2015 Mercedes-Benz SL Features

Standard features include the COMAND infotainment system, a 7-inch display, a USB port, Bluetooth, an 11-speaker Harman Kardon audio system, HD Radio, satellite radio, and navigation. Available features include a 12-speaker Bang & Olufsen audio system, and a Splitview front-seat entertainment system that allows both the driver and front passenger to view different images on each screen.

The COMAND system has impressive menu options and user-friendly buttons, but it may take some time to figure out some common audio and navigation functions.

See 2015 Mercedes-Benz SL specs »

Read more about SL interior »

2015 Mercedes-Benz SL Dimensions

Mercedes-Benz SL Cargo Space

Cargo space in the SL is good for a convertible. It has 13.5 cubic feet of cargo space when the top is up, and there's 8.5 cubic feet of space with it down. There isn't a lot of small-item storage space, but a hands-free trunk lid is available.

2015 SL Length and Weight

The 2015 SL is about 15.1 to 15.2 feet long. Its curb weight ranges from 3,858 to 4,211 pounds.

Where Was the 2015 Mercedes SL Built?

Mercedes built the 2015 SL in Germany.

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