Mercedes-Benz SL 43 or AMG® SL 55: which SL fits Austin drivers?

Choose the SL 43 if the lower starting price leads your list; choose the AMG® SL 55 if the strongest performance figures lead it. Mercedes-Benz of South Austin sells the SL Roadster at 10900 S I-35 Frontage Rd, Austin.

Drivers on the south side of Austin, and in Buda, Kyle and Dripping Springs, weigh the same four things: price, power, drivetrain and fuel economy. The published figures answer each one. The trim you choose follows from the one you rank first.

Keep reading below, then schedule a test drive in Austin. Bringing your own numbers to the lot settles this faster than any spec sheet.

The SL 43 fits value-first Austin drivers; the AMG® SL 55 fits power-first ones

The SL 43 suits the Austin driver who puts the lower starting price first. The AMG® SL 55 suits the driver who puts performance first. Both trims are SL Roadsters, so the choice comes down to what each one gives you for its price.

Austin driving breaks into a few kinds of trips: the daily commute, a Hill Country run, top-down cruising, and the days it rains. A value-first driver can weigh those trips against a lower price. A power-first driver can weigh them against more horsepower and torque. Its published figures give up some power and gain on fuel economy, so the SL 43 is the trim for a driver whose list starts with cost and efficiency.

What does the SL 43 cost compared with the AMG® SL 55?

The SL 43 starts at $112,550. The AMG® SL 55 starts at $145,250 (Mercedes-Benz, 2026).

Both figures are starting MSRP, the manufacturer’s suggested price for each trim. Put them side by side before you weigh any other figure. If the lower number is the ceiling on your budget, the SL 43 is the trim that fits it. If your budget can reach the higher number, the power figures should decide the choice.

How do the SL 43 and AMG® SL 55 differ in power and acceleration?

The AMG® SL 55 makes 469 horsepower and 516 lb-ft of torque. The SL 43 makes 416 horsepower and 369 lb-ft (Mercedes-Benz, 2026).

Torque governs how hard a car pulls from a stop and on a climb. If the reason you are buying is how the car pulls, the SL 55 is the trim whose published figures lead.

The SL 43 still makes a strong case for a driver who wants an open-top roadster without the higher price. Its figures are lower, but they are the figures of a complete sports car, and the price difference is the reason to weigh them.

Which drivetrain does each SL use for Hill Country drives?

The SL 43 is a hybrid with rear-wheel drive. The SL 55 is gasoline with all-wheel drive through its 4MATIC® Plus system (Mercedes-Benz, 2026).

On the SL 43, power goes to the rear wheels only. On the SL 55, power goes to all four wheels. The SL 43 has a curb weight of 4,012 pounds, and the SL 55 weighs 4,332 pounds.

If most of your drives are hill roads, all-wheel drive is the feature to weigh first, and only the SL 55 has it. If rear-wheel drive and the hybrid system suit your roads, the SL 43 gives you both, at the lighter curb weight.

What are the EPA fuel economy ratings for the SL 43 and AMG® SL 55?

The SL 43 is rated 19 city, 27 highway and 22 combined mpg. The SL 55 is rated 14 city, 21 highway and 16 combined mpg (EPA, 2026).

The combined figure is a weighted average. City is weighted at 55% and highway at 45% (U.S. Environmental Protection Agency, 2026). For a daily commute that mixes city and highway miles, the combined figure is the one to read first.

The SL 43 leads on all three ratings. Over a year of mixed driving, that lead shows up at the pump, so fuel economy is a real part of the choice, not a footnote to it.

Compare the SL 43 and AMG® SL 55 on every published figure

Every figure in this table is a published 2026 figure for the trim named (Mercedes-Benz, 2026; EPA, 2026).

The SL 55 leads on power, torque and all-wheel drive. The SL 43 leads on starting price and on fuel economy.

Who should skip the SL 43, and who should skip the AMG® SL 55?

Skip the SL 43 if the most horsepower and torque lead your list, since the AMG® SL 55 makes 469 horsepower to the SL 43’s 416. Skip the AMG® SL 55 if the lower starting price or the higher combined fuel economy rating leads it.

A driver who wants all-wheel drive for Hill Country roads should skip the SL 43 for that reason alone. A driver who wants the hybrid system and rear-wheel drive should skip the SL 55 for the same kind of reason, because the SL 43 is the trim that gives both.

Power-first and value-first drivers rank the same figures differently. Pick the trim that matches the figure you rank first, then check the rest of the list against it.

Frequently asked questions

What warranty comes with a new SL Roadster?

A new SL Roadster carries a basic warranty of 4 years or 50,000 miles (Mercedes-Benz, 2026). The term applies to the SL model line, so it covers both the AMG® SL 43 and the AMG® SL 55.

How much is Texas sales tax on a new SL?

On a new SL, Texas charges motor vehicle sales tax at 6.25% of the sales price after any trade-in allowance is subtracted (Texas Comptroller of Public Accounts, 2026). A trade-in lowers the amount the tax is figured on, so it matters on either trim.

How do I apply for financing or find lease specials on an SL?

There is a secure finance application online. We offer both financing specials and leasing specials.

Where can I get an SL serviced on the south side of Austin?

We offer same-day service and 48 service bays at 10900 S I-35 Frontage Rd, Austin, TX 78748. The service department is open Monday to Friday from 7:00 AM to 6:00 PM and Saturday from 8:00 AM to 5:00 PM, and it is closed Sunday.

How many seats and how much trunk space does the SL Roadster have?

Both the AMG® SL 43 and the AMG® SL 55 have 41.5 inches of row 1 legroom and 7.5 cubic feet of maximum cargo (Mercedes-Benz, 2026). The cargo figure is the one to check against the bags you plan to carry on a top-down trip.

What do customers say about buying from Mercedes-Benz of South Austin?

Customers describe the buying process in their own words. In a May 2026 5-star Google review, Brad W. wrote: “Kirby and Carrie were amazing. One of the best car buying experiences of my life (and I’ve had many). No pressure, they listened and made the process simple. Visit Kirby in sales. You’ll love her.”

Shop the SL Roadster at Mercedes-Benz of South Austin

Mercedes-Benz of South Austin is part of Group 1 Automotive, and we sell new Mercedes-Benz vehicles, including the SL Roadster. We carry a 4.6-star rating across 862 Google reviews, and 89 in 100 of those reviews are five-star (Google, 2026). We call ourselves a Mercedes-Benz AMG® Performance Center, which matters if the AMG® SL 55 is on your list.

A Certified Pre-Owned Mercedes-Benz includes a certification process and 24-hour Roadside Assistance, along with a one-year unlimited-mileage warranty that can be extended for up to two more years. Sales hours are 8:30 AM to 7:00 PM Monday to Friday, and Saturday closing is 6:00 PM. Sales is closed Sunday.

Customers name the people who made their visits work. In a June 2026 5-star Google review, S. S. wrote: “Tim G., my sales person, was great and communicative. Lee the general manager was very helpful and friendly. Carrie in finance provided a smooth pressure free purchasing process. Overall, the staff and the facilities made it a great buying experience.”

In an August 2026 5-star Google review, Melissa N. wrote: “Definitely recommend coming to this dealership if you are looking to buy a car new or used! Kirby Chase and Lee Tinoco are absolutely amazing in every way! We have bought three cars with them over time and every single time we leave happy, excited, and in love with the new vehicle. They make the buying process easy and smooth so that all you have to worry about is loving the car you’re purchasing. Highly highly recommend asking for them if you are in South Austin!”

Start with the trim your list ranks first. Bring that choice and your questions to Mercedes-Benz of South Austin at 10900 S I-35 Frontage Rd, Austin, TX 78748, or start your secure finance application online when you are ready to compare terms.

Mercedes-Benz of South Austin answers this question against the specific vehicle in front of you rather than the model in general. Value your trade and get pre-approved online, then see us at our Austin showroom, or call 512-646-6699.

Disclaimer: Vehicle features, specifications, pricing, options, and availability may vary based on production timelines and dealership inventory; images are for illustrative purposes only. Starting MSRP figures are national and exclude destination freight charges, tax, title, license, and dealer fees. Standard and available equipment varies by trim, configuration, and model year; confirm the specification of the individual vehicle before purchase. Maximum towing and payload ratings depend on cab, bed, drivetrain, and equipment configuration; see the vehicle’s Owner’s Manual and trailering guide for limits. Electric range and charging times vary with battery, configuration, temperature, terrain, load, and driving habits. Safety or driver assistance features are no substitute for the driver’s responsibility to operate the vehicle in a safe manner. Financing and pre-approval are subject to credit approval. Contact Mercedes-Benz of South Austin for complete details regarding current vehicle inventory, pricing, and equipment.