Mercedes SL400 2016 Complete Review And Specs

The 2016 Mercedes-Benz SL400 stands out as a masterful blend of raw power, sophisticated engineering, and uncompromised comfort in the luxury roadster segment. Powered by a twin-turbocharged 3.0-liter V6 engine delivering 329 to 367 horsepower depending on market specifications, this entry-level SL model punches well above its weight with a 0-60 mph time of just 4.9 seconds. Paired with a smooth nine-speed automatic transmission in updated variants, it propels rear wheels with effortless torque peaking at 354 to 500 Nm from as low as 2,000 rpm, making it ideal for both spirited drives and long-distance cruising.

Engine and Performance: Surge of Power Meets Everyday Refinement

At the heart of the SL400 lies its potent twin-turbo V6, a 3.0-liter unit that revs cleanly to high rpms with a distinctive bark from the exhaust. This engine not only meets but exceeds expectations for an “entry-level” SL, accelerating from 0-62 mph in 4.9 seconds and reaching an electronically limited top speed of 155 mph. Real-world testing confirms these figures, with Edmunds clocking 0-60 mph in 4.9 seconds on their evaluation route.

The nine-speed automatic gearbox transforms the driving experience, offering seamless shifts and a gear for virtually every scenario, from urban stop-start to highway overtaking. Torque delivery is broad and immediate, ensuring a surge of acceleration with minimal throttle input. While it lacks the explosive punch of V8 siblings like the SL550, the SL400’s refinement shines in daily use, complemented by an automatic engine stop-start system for efficiency.

Fuel economy is respectable for a grand tourer, with EPA ratings of 20 city/27 highway mpg (23 combined), and testers achieving up to 26.5 mpg in mixed driving. European figures report around 36.7 mpg combined under optimized conditions.

Handling and Suspension: Precision Meets Plush Comfort

The SL400 excels as a grand tourer rather than a track-focused sports car, prioritizing long-haul comfort with capable handling. Standard semi-active adaptive dampers provide a balanced ride, but the optional Active Body Control (ABC) suspension, priced around £3,080, elevates it to another level. ABC virtually eliminates body roll, counters cornering forces with curve-tilting functionality, and delivers a supremely supple ride over imperfections.

Reviewers praise its agility despite the car’s size, with nimble steering that’s weighted for feedback without being overly heavy. Powerful brakes inspire confidence, and the rear-wheel-drive layout ensures predictable dynamics. On highways, it devours miles with minimal road noise, even with the roof stowed, maintaining a quiet, cosseting cabin.

• Standard Suspension: Adaptive dampers handle everyday roads well but transmit some small bumps.
• Active Body Control: Absorbs high-speed compressions and ripples; tilts into corners for stability.
• Steering: Accurate and progressive, ideal for grand touring.

Design and Aerodynamics: Timeless Roadster Elegance

The sixth-generation SL, facelifted for 2016, boasts enhanced road presence with subtle visual updates. Its retractable hardtop (Vario-Roof) folds neatly into the boot, preserving a spacious 500-liter cargo area. A clever mechanism lifts the roof by 25 degrees when stowed, easing loading of bulky items.

Exterior lines emphasize luxury over aggression, positioning it above the smaller SLK and below supercars like the AMG GT. Inside, vast adjustability for seats and steering wheel ensures ergonomic perfection for driver and passenger. Materials exude premium quality, with a refined cabin that’s whisper-quiet at speed.

Interior Comfort and Practicality: Luxury Without Compromise

Despite its two-seater convertible format, the SL400 surprises with usability. The boot remains practical post-roof retraction, and the adjustable folding mechanism aids accessibility. Cabin space feels generous, with supportive seats and high-end finishes.

It’s a cosseting environment for cross-country trips, blending sports car thrills with limousine-like serenity. Optional features like ABC enhance isolation from road harshness, making it suitable for imperfect surfaces.

Technology and Safety: Cutting-Edge for 2016

The 2016 SL400 includes advanced driver aids standard, with options expanding capabilities. Key tech encompasses adaptive cruise, lane-keeping assists, and a sophisticated infotainment system. Safety ratings reflect Mercedes’ engineering prowess, though specific crash data for this model emphasizes structural integrity and active systems.

Braking performance is exemplary, with strong, fade-resistant stops underscoring its grand touring credentials.

Ownership Costs and Reliability: Value in the Luxury Segment

As the most affordable SL, the SL400 offers lower running costs than V8 models while delivering 90% of the performance. Consumer ratings average 4.6/5, praising value, performance, and quality. Maintenance follows Mercedes’ premium schedule, but efficiency aids long-term ownership.

It’s positioned as “all the SL you’d ever need,” especially for those prioritizing balance over outright excess.

Pros and Cons: Balanced Verdict

• Pros: Explosive acceleration, refined transmission, exceptional ride with ABC, practical boot, luxurious interior.
• Cons: Optional ABC adds cost, steering lacks ultimate sharpness for track use, small bumps felt on base suspension.

Who Should Buy the 2016 Mercedes SL400?

Ideal for enthusiasts seeking a versatile roadster that transitions seamlessly from daily drives to weekend getaways. It outshines pure sports cars in comfort while rivaling them in pace, making it a top grand tourer choice.

Frequently Asked Questions (FAQs)

What is the 0-60 mph time for the 2016 SL400?

4.9 seconds, confirmed in independent tests.

Does the SL400 have a hardtop convertible?

Yes, its retractable Vario-Roof folds into the boot without sacrificing much space.

Is Active Body Control worth the extra cost?

Absolutely for ultimate comfort and handling; it transforms the ride.

How fuel-efficient is the SL400?

EPA: 23 mpg combined; real-world up to 26.5 mpg.

What’s the top speed?

155 mph, electronically limited.