Mercedes SL400 2014 Review: Performance, Luxury, Specs

The 2014 Mercedes-Benz SL400 marks a significant evolution in the iconic SL lineup, introducing a new twin-turbocharged 3.0-liter V6 engine that boosts performance while enhancing efficiency. This model blends grand touring comfort with sports car agility, making it a standout choice for enthusiasts seeking open-air luxury without compromise.

Powertrain Evolution: From Naturally Aspirated to Turbocharged Excellence

Mercedes-Benz replaced the previous 3.5-liter naturally aspirated V6 with a more advanced bi-turbo 3.0-liter unit in the SL400. This change delivers 245 kW (333 horsepower) and 480 Nm of torque, surpassing the old model’s 225 kW and 370 Nm outputs. The result is quicker acceleration, with 0-100 km/h in approximately 5.2 seconds and a top speed electronically limited to 250 km/h.

Paired with a seven-speed 7G-Tronic automatic transmission, the powertrain offers seamless shifts in automatic mode or engaging paddle-shift control for manual intervention. Mid-range torque shines during overtakes, providing effortless surges without needing high revs. Real-world fuel consumption hovers around 9-13.7 L/100 km, better than thirstier rivals despite the performance.

This setup prioritizes refined cruising over outright track prowess, aligning with the SL400’s sports tourer ethos.

Interior Refinement: A Sanctuary of Luxury and Ergonomics

Step inside the SL400, and you’re greeted by an impeccably crafted cabin that exemplifies Mercedes’ attention to detail. High-quality materials, from supple leather to polished metal accents, create a premium ambiance. The seats feature active bolsters and massage functions, offering exceptional support for long journeys while hugging occupants during dynamic driving.

Ergonomics are intuitive, with adjustable seats, steering wheel, and mirrors ensuring a perfect driving position for most drivers. Visibility is excellent over the long hood, enhancing the sense of command. Despite its two-seater layout, the interior feels spacious, with ample legroom and headroom even with the roof up.

• Seating: Multi-contour design with ventilation, heating, and massage.
• Infotainment: High-resolution displays with Splitview for dual passenger views.
• Storage: Practical frunk and trunk space unaffected by roof operation.

The cabin’s build quality stands out, free of rattles even with the top down, making it one of Mercedes’ finest interiors of the era.

Chassis and Handling: Balanced for Grand Touring Bliss

The SL400’s chassis delivers a cosseting ride without sacrificing composure. Standard suspension absorbs imperfections smoothly, while optional Active Body Control (ABC) enhances cornering by minimizing body roll and dive. This system makes the car feel more athletic on twisty roads, with precise steering at low speeds transitioning to stability at higher paces.

Rear-wheel drive and massive grip from wide tires ensure confident handling. Throttle response is immediate, allowing trail-braking into corners or quick adjustments via lift-off. It’s not as razor-sharp as a pure sports car like the Jaguar F-Type, but excels in versatility—perfect for motorways or scenic routes.

With the roof retracted, structural rigidity impresses, maintaining taut body control over uneven surfaces. This makes the SL400 ideal for relaxed top-down drives where wind buffeting is minimal up to highway speeds.

Innovative Features: Technology That Enhances the Drive

The SL400 brims with Mercedes’ cutting-edge tech. The retractable hardtop deploys in seconds, offering coupe-like insulation or open-air freedom. Magic Sky Control is a highlight: an electrochromic roof that tints at the touch of a button, blocking glare and UV rays without traditional shades.

Other standouts include adaptive cruise control, night vision assist, and a premium Burmester sound system that fills the cabin even roof-down. The COMAND infotainment is responsive, with paddle shifters adding engagement. Safety features like collision prevention and attention assist round out the package.

Practicality and Everyday Usability

Despite its exotic profile, the SL400 proves practical. The folding hardtop doesn’t intrude on luggage space, providing a generous trunk. Entry and exit are eased by lower door sills compared to predecessors. Fuel tank holds 65 liters, supporting long-distance tours.

It’s comfortable for daily duties, from airport runs to weekend getaways. The engine’s broad torque band eliminates gear-hunting in traffic, and the ride remains plush in Comfort mode.

Reliability, Ownership, and Value

Mercedes backs the SL400 with a 4-year/50,000-mile basic warranty. RepairPal rates it 3/5 for reliability, average for luxury cars, with some recalls noted. Owners praise its durability and low maintenance if serviced properly.

Running costs reflect its premium status: expect higher insurance and fuel than sedans, but resale holds strong due to desirability. Compared to rivals like the Porsche 911 Cabriolet, it offers more luxury at similar performance.

Pros and Cons at a Glance

Who Should Buy the 2014 SL400?

This roadster suits those prioritizing comfort, tech, and effortless power over raw track thrills. It’s a superb choice for affluent drivers wanting a daily-usable convertible that doubles as a long-haul cruiser. If you crave more aggression, consider AMG variants.

Frequently Asked Questions (FAQs)

Is the 2014 SL400 faster than the previous SL350?

Yes, the turbo V6 provides quicker 0-100 km/h times and superior torque.

How does the Magic Sky roof work?

It uses electrochromic glass that darkens electronically for shade and UV protection.

What’s the real-world fuel economy?

Around 9-14 L/100 km depending on driving style.

Is Active Body Control worth it?

Absolutely for better handling and ride quality on varied roads.

How reliable is the SL400?

Average for luxury cars, with good owner satisfaction.