New Mercedes SL roadster to be unveiled on 28 October

The next-generation Mercedes SL will only be available in AMG guise, with 2+2 seating, a fabric roof and upgraded technology

  • All-new flagship roadster gets AMG-only model range
  • Will feature a new platform and lightweight body
  • Next-generation SL gets two rear seats

The next-generation Mercedes SL roadster will be officially unveiled next week on 28 October. The new car will only be available in performance-orientated AMG form, as the brand looks to reinvent the SL. It’ll get an all new exterior design bearing the brand’s signature ‘Panamericana’ front grille, a 2+2 seating layout (meaning there’s no middle rear seat) and four-wheel drive for the first time in its history.

Top 10 best luxury cars 2021

According to Mercedes, the interior of the new seventh-generation SL will be “driver focused” and feature a digital twin-screen set-up shared with the new S-Class and C-Class. The new car has been developed by Mercedes’ AMG performance division and uses a new platform and a lighter body.

When it launches, the new SL will effectively replace the now-discontinued Mercedes S-Class Cabriolet. Prices are likely to start at around £85,000 and the SL will be a direct rival to the BMW 8 Series Convertible.

Ahead of the car’s full unveiling next week, we’ve taken a passenger ride to see how Mercedes’ new flagship convertible is shaping up. Read on for everything we know so far.

2021 Mercedes SL roadster: styling

In these latest images, the AMG influence on the styling of the SL is clear to see. The nose of the car is dominated by a wide ‘Panamericana’ radiator grille, while at the rear the AMG signature rectangular quad exhaust system features.

The front of the car is angular, with sharp vertical bonnet creases, large air intakes and an upswept, slim headlight design. Large alloy wheels are also fitted, with a wider set on the rear, along with flared front and rear arches to accentuate the car’s low, aggressive stance. A rear diffuser is visible through the camouflage and an electronically deployable rear spoiler also features, which houses the uppermost brake-light cluster.

The biggest change for this model, however, is the fabric roof that replaces the metal folding unit of the old car. In these preview images, it’s clear that it gives the SL a sleeker profile than before, with a rakish design similar to the latest Porsche 911 convertible.

The SL will be sold as a ‘2+2’, meaning the rear seats will be good for short journeys or children. The boot should also be bigger because a folded fabric roof is more compact than a folded metal version. Switching to a soft top brings weight and centre-of-gravity benefits, too.

Interior and technology

Mercedes has already released a series of official images confirming the interior of the new SL will receive a much needed refresh. It follows the lead of the latest S-Class and C-Class, with two digital screens. A 12.3-inch digital dial cluster is fitted and is integrated into a visor to prevent reflections when the roof is down.

The main infotainment touchscreen is a 11.9-inch portrait unit mounted in the centre console. It features electrical adjustment, meaning drivers can adjust the angle to prevent glare. This dual-screen setup runs Mercedes’ latest MBUX system, as already seen in the new S-Class, but with AMG-specific features including the Track Pack and Performance settings.

The rest of the interior looks similar to the brand’s recently updated models, with a new three-spoke steering wheel, propeller-style air vents and ambient lighting. The front seats are a new compact design and buyers will be able to pick from a range of trims including two-tone nappa leather or a mix of nappa leather and Dinamica fabric. The new SL will have a 2+2 seating layout, with the two rear seats intended for occasional use.

As a flagship model, we’d expect the new SL to get all of Mercedes’ latest safety technology, including features like adaptive cruise control, traffic-sign recognition and a driver alertness monitor. New driver assistance tech is likely to include blind-spot monitoring and lane-change assist.

Chassis and construction

According to Mercedes, the underpinnings of the new SL is constructed from a mix of aluminium, steel, magnesium and fibre composites to reduce weight, with the bare platform pictured above weighing in at only 270kg.

The platform’s design is entirely new from the ground up, with no parts or elements carried over from current or outgoing models. The body is more rigid than the current AMG GT Roadster model as well, with 50% more rigidity across the width and a 40% improvement across its overall length. Mercedes says the car’s rigidity improvements make it more agile to drive and more precise, with less body lean during cornering.

Further improvements have been made to make the new SL better to drive, including a lower centre of gravity. To achieve this, the engine sits lower and closer to the centre of the car. Mounting points for the front and rear axles and subframes are lower than before too.

Engines and performance

The engine range is likely to start with an entry-level SL 43 model powered by a 3.0-litre six-cylinder engine, while a more powerful SL 63 model is likely to use the 604bhp twin-turbocharged V8 petrol engine from the E63 line-up. It’s thought mild-hybrid technology will feature, and a plug-in hybrid can’t be ruled out either. Mercedes is working on an electrified powertrain with around 800bhp for the AMG GT 4-door, and this seems a strong candidate for the SL - especially as AMG will produce hybrid models of every car it launches.

2021 Mercedes SL roadster passenger ride by Thomas Geiger

While the popularity of the SL has gradually declined in the past two generations, the iconic model remains a priority for Mercedes. That’s why for this latest model the brand has started with a completely new design, while also putting the AMG performance division in charge of the car’s development. 

Part of starting from scratch means the SL sits on an entirely new aluminium-space frame chassis, giving it a new 2+2 seating layout. To accommodate the extra seats, the gearbox has been moved to the front of the car behind the engine. This configuration change puts the driver's seat virtually in the middle of the car, improving both visibility and manoeuvrability.

From the passenger seat of the SL 63 S prototype, it’s immediately obvious that the re-engineering has improved the car. It feels more precise than the softer approach of the previous-generation model, with vastly improved grip and minimal body lean in corners. On our road test route in Germany, the SL was smooth and refined with the chassis soaking up most of the road imperfections. It felt very secure at all speeds, with only the switch to Sport Plus model making it feel firm. 

On the twisty roads leading to the Nurburgring, AMG Chief Technology Officer Jochen Hermann described the steering as secure and precise, with the car flowing through several corners calmly without any sign of understeer. The biggest surprise is the turning circle; which thanks to all-wheel steering means the five-metre long SL can be turned around like an A-Class hatchback. 

While Mercedes wouldn't talk about the engine, it was obvious from the growling exhaust note that the familiar 4.0-litre V8 AMG unit sits under the bonnet. It lacks the aggressiveness of the GT model  but it certainly felt quick enough in our SL 63 S prototype. 

Verdict:

From this brief passenger ride, it's obvious the new SL has made the transition from grand tourer to genuine sports car. Despite this, it's still smooth and refined, and easier to drive and more engaging than the current AMG GT.

See where the latest Mercedes S-Class sits on our list of best luxury cars.

Recommended

New 2022 Mercedes GLC will have more tech
Mercedes GLC render
Mercedes GLC
15 Oct 2021

New 2022 Mercedes GLC will have more tech

MINI Convertible review
Best Convertible: MINI Convertible
MINI Convertible
14 Oct 2021

MINI Convertible review

Mercedes A 250 e hatchback review
Best Plug-in Hybrid: Mercedes A 250 e
Mercedes A 250 e hatchback
13 Oct 2021

Mercedes A 250 e hatchback review

BMW Z4 roadster review
BMW Z4 Roadster
BMW Z4
27 Sep 2021

BMW Z4 roadster review

Most Popular

What is AdBlue?
What is adblue?
Tips and advice
18 Oct 2021

What is AdBlue?

Top 10 best company cars 2021
Hyundai Ioniq 5 front 3/4 cornering
Best cars
14 Oct 2021

Top 10 best company cars 2021

Top 10 best hybrid cars 2021
Hyundai Tucson SUV review
Best cars
22 Oct 2021

Top 10 best hybrid cars 2021

Tips & advice

View All
Car dashboard warning lights: the complete guide
Car dashboard symbols and meanings
Tips and advice
10 Aug 2021

Car dashboard warning lights: the complete guide

Electric car charging stations: a complete guide
Electric car charging station
Tips and advice
3 Jun 2021

Electric car charging stations: a complete guide

PCP vs HP – which type of car finance is right for you?
PCP vs HP
Tips and advice
29 Sep 2021

PCP vs HP – which type of car finance is right for you?

Average speed cameras: how do they work?
Average speed cameras: how do they work?
Tips and advice
23 Jul 2021

Average speed cameras: how do they work?

Best cars

View All
Top 10 best car interiors 2021
Peugeot 208 hatchback
Best cars
25 Jun 2021

Top 10 best car interiors 2021

Top 10 best electric cars 2021
Ioniq 5
Best cars
20 Oct 2021

Top 10 best electric cars 2021

Top 10 best cheap-to-run cars 2021
Toyota Prius front 3/4 cornering
Best cars
10 Jun 2021

Top 10 best cheap-to-run cars 2021

The UK's top 10 fastest hot hatchbacks
Mercedes AMG A45 - rear
Hot hatches
25 Jun 2021

The UK's top 10 fastest hot hatchbacks