Say hello to the world’s fastest and most powerful cabriolet

Anytime the words “world’s fastest” and “most powerful” are mentioned, a lot of people immediately look for the source of these words. In this case, it’s German tuner Brabus that’s doing the boasting when it announced its new program for the Mercedes-AMG S63 Cabriolet, appropriately called the Brabus 850 6.0 Biturbo Cabrio.

So why exactly was this AMG S63 christened as the world’s fastest and most powerful cabriolet? For that, we have to look at the sweeping changes the tuner made to the car’s 5.5-liter bi-turbo V-8 engine. The process was complicated, but in the end, Brabus was able to increase the V-8’s output from the standard 577 horses and 664 pound-feet of twist to an enormous 838 horsepower and 848 pound-feet of torque.

The result is nothing short of impressive, but it’s also not the only notable thing about this particular program. Just as important are the upgrades down on the periphery, including the new aero kit, the customizable interior, and the fresh offer of new wheels, which is an underrating of the entire tuning experience given how important they are in the overall makeup of the tuned AMG S63 Cabriolet.

Other tuners have also developed programs of their own for both coupe and cabriolet versions of the AMG S63. But Brabus is probably the only one that is confident enough to lay the “world’s fastest” and “most powerful” claim for its program. That speaks to the kind of confidence the tuner has in its own abilities, something that nobody has questioned in a long time.

Continue after the jump to read the full review.

  • 2016 Mercedes-AMG S63 Cabriolet 850 By Brabus
  • Year:
  • Make:
  • Model:
  • Engine:
  • Horsepower @ RPM:
    838 @ 5400
  • Torque @ RPM:
    1069 @ 2500
  • Displacement:
    6.0 L
  • 0-60 time:
    3.5 sec.
  • Top Speed:
    217 mph
  • car segment:
  • body style:


2016 Mercedes-AMG S63 Cabriolet 850 By Brabus High Resolution Exterior
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2016 Mercedes-AMG S63 Cabriolet 850 By Brabus High Resolution Exterior
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2016 Mercedes-AMG S63 Cabriolet 850 By Brabus High Resolution Exterior
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The AMG S63 Cabriolet was the recipient of a host of aerodynamic upgrades that have been installed to help improve the car’s stability in light of the massive performance upgrades given to its 5.5-liter, twin-turbo V-8 engine. Brabus put particular emphasis on the front and rear of the car with a front spoiler that attaches to the front bumper and a carbon rear spoiler installed on the trunk lid to help improve downforce on the front and rear axles. Tailor-made carbon surrounds were also used to surround the large side air intakes in the front bumper. Likewise, a carbon diffusor was added to the rear section of the AMG S63 Cabriolet, not to mention the carbon attachments for the side air outlets in the rear. On the cosmetic side, the German tuner is including naked carbon covers for the exterior mirrors.

Moving to the wheels, Brabus opted to give the program a new set of Monoblock wheels. The wheels are available in different sizes - 18 inches to 22 inches - but for this particular program, Brabus opted for a set of its own 21-inch “Platinum Edition” forged wheels that can be fitted with 9Jx21 tires in the front and 10.5Jx21 tries at the back.


2016 Mercedes-AMG S63 Cabriolet 850 By Brabus Interior
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True to form, Brabus is also offering a series of interior refinements for the AMG S63 Cabriolet. The highlight of the interior is the customer’s ability to customize it with premium materials like fine leather and carbon fiber that can be personalized in a variety of colors. The carbon fiber offering is used to replace the production wood inlays and trim strips in the interior. The German tuner is also offering aluminum components that can be used to replace the stock door pins, pedals, and paddle shifters. Last but not least is a new speedometer that comes with a top speed of 250 mph. This speedometer is essential to the overall tuning package, especially with the work Brabus put into the AMG S 63 Cabriolet’s V-8 engine.


2016 Mercedes-AMG S63 Cabriolet 850 By Brabus High Resolution Drivetrain
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First, let’s look at the Mercedes-AMG S63 Cabriolet in standard configuration. This open-top bad boy comes with a 5.5-liter bit-turbo V-8 engine that pumps out 577 horsepower and 664 pound-feet of torque, allowing it to sprint from 0 to 62 mph in 3.9 seconds to go with a top speed of 186 mph. Impressive, right?

Now, this is where it gets interesting. The noted Merc tuner first bored out the block and increased the V-8 engine’s displacement from 5.5 liters to 6.0 liters. From there, it fitted a bevy of new components, including a new crankshaft, connecting rods, cylinder heads, forged pistons, turbochargers, intake module, and an exhaust system. Combining all of this up, the tuner was able to increase the V-8’s output to a ridiculous 838 horsepower at 5,400 rpm and 1,069 pound-feet of torque between 2,500 and 4,500 rpm. That said, the tuner capped the peak torque at 848 pound-feet to maximize the long-term potential of the heavily modified V-8 engine.

The performance numbers speak for themselves as the AMG S63 Cabriolet, with Brabus’ upgrades in tow, is now capable of sprinting from 0 to 60 mph in just 3.5 seconds and from 0 to 124 mph in just 9.4 seconds. The car’s top speed also increased to 217 mph, but once again, Brabus opted to cap it at that number to keep the tires in proper working condition.

Chassis and Suspension

Further improvements in handling and stability come courtesy of a lowering module that Brabus itself worked on. This kit is specifically calibrated to lower the ride height of the AMG S63 Cabriolet by about 0.60 inches.


Brabus didn’t divulge the pricing details for the program but it did say that customers are free to buy the AMG S63 Cabriolet with the kit already installed or have their cars fitted with the kit. Seeing as the actual donor car costs around $180,000, it would be reasonable to think that the total cost of the program, including the donor car, will amount to about $250,000.


Mercedes-AMG S63 by Mansory

2016 Mercedes-AMG S63 Coupe Black Edition By Mansory High Resolution Exterior
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Since there aren’t that many programs for the open top version of the AMG S63, allow me to instead look at what other tuners have done with the coupe version of the luxury performance car. Mansory is one of the tuners that had a program available after it was launched at the 2016 Geneva Motor Show. That program came with its own share of exterior and interior upgrades, but the engine upgrade is what I’ll focus on. Mansory didn’t increase the V-8’s displacement, but it did add a host of new components to the engine, including a new turbocharger and a compressor system. The result is 985 horsepower and 1,034 pound-feet of torque, enough to help the AMG S63 push to 60 mph in just 3.2 seconds. Unfortunately, the car’s top speed still stands at an electronically limited 186 mph.

Read our full review here.

Mercedes-AMG S63 by G-Power

2015 Mercedes S63 AMG By G-Power High Resolution Exterior
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G-Power is another tuner that has worked on making the AMG S63 fiercer and more intimidating. The tuner accomplished that by using its own Bi-Tronik 5 V1 power upgrade, which helps the bi-turbo V-8 increase its output to 705 horsepower and 738 pound-feet of torque. It’s not as much as what Brabus and Mansory were able to get out of their respective programs, but it’s still good enough to have a 0-to-60-mph time of 3.8 seconds to go with a new top speed of 205 mph.

Read our full review here.


2016 Mercedes-AMG S63 Cabriolet 850 By Brabus High Resolution Exterior
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Is there really anything else to say here? Brabus is known for building programs that usually result in cars that are described as the world’s-fastest-this or the world’s-fastest-that. It’s not surprising that the German tuner known for its insane Mercedes programs has developed another program that follows the same blue print. Everything about this kit speaks to the kind of tuning talent and admittedly demented mind that Brabus has for Mercedes models. I love it!

  • Leave it
    • Will not be cheap
    • Not for the feint of heart
    • Might be too excessive for some

Press Release

BRABUS 850 6.0 Biturbo Cabrio – the world’s fastest and most powerful four-seat cabriolet: What setting would be better suited for the world premiere of this unique supercar than the most famous car race in the world, the 24 Hours of Le Mans?
Motul, one of the leading manufacturers of high-performance lubricants in the world and exclusive technology partner of BRABUS, presents the cabriolet with a power output of 625 kW / 850 HP (838 bhp) and a top speed of 350 km/h (217 mph) not only in the paddock of the endurance race classic, but also as part of the official drivers’ parade on the Friday before the race, June 17, 2016.

2016 Mercedes-AMG S63 Cabriolet 850 By Brabus High Resolution Exterior
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The BRABUS 850 6.0 Biturbo Cabrio based on the Mercedes S 63 4MATIC seamlessly continues the tradition of the exclusive high-performance cars from BRABUS (Brabus-Allee, D-46240 Bottrop, phone + 49 / (0) 2041 / 777-0, fax + 49 / (0) 2041 / 777 111, Internet However, the open-top two-door car with all-wheel drive not only impresses on account of its unique performance, but above all with its sporty and elegant appearance featuring naked carbon aerodynamic-enhancement components and 21-inch hi-tech forged wheels.

The twin-turbo eight-cylinder engine in the bow of the cabriolet is constructed in the engine shop of the BRABUS Manufaktur in Bottrop equipped with state-of-the-art machinery. The displacement is increased from 5,461 cc to 5,912 cc (333 to 361 cc) by installing a forged BRABUS special crankshaft with longer stroke, increasing the cylinder bore and fitting the matching forged pistons and high-performance connecting rods. The two cylinder heads are also re-machined to guarantee maximum power delivery.

2016 Mercedes-AMG S63 Cabriolet 850 By Brabus High Resolution Exterior
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In addition, the engine peripherals are thoroughly revised. Two BRABUS special turbochargers with larger compressor units and modified exhaust manifolds replace the production turbos on the exhaust side. As part of the engine conversion, BRABUS also installs down pipes with a diameter of 75 millimeters (3 in) and special metal catalysts. The BRABUS stainless-steel sport exhaust system with butterfly valves electronically controlled from the cockpit optimizes the power delivery and the engine sound. In the “Coming Home” standard mode, the high-performance cabriolet has an even more subtle exhaust note than with the production system. On the other hand, when the valves are open, the eight-cylinder twin-turbo engine sounds as sporty as a super sports car.

The intake side of the turbocharged eight-cylinder engine was also revised thoroughly as a matter of course. Immediately conspicuous upon opening the hood is the specially designed and significantly larger BRABUS 850 intake module made from carbon. Just as essential for the power increase are the two more voluminous air filter boxes, which draw their air from a special duct in the hood, and new carbon air ducts with considerably larger cross sections. An especially striking feature is the BRABUS Gold Heat Reflection sheathing for the intake and charge-air pipes of the twin-turbo system.

Precisely calibrated mapping for injection and ignition as well as a modified electronic boost pressure limiter are also part of this high-performance engine, which BRABUS, like all other components, backs with a three-year, 100,000-kilometer/62,000-mile warranty (see BRABUS Warranty Terms and Conditions, updated July 2013). Such a high-performance engine naturally also demands the best available fully synthetic motor oil, which like for all BRABUS engines, is supplied for this supercar together with the hi-tech lubricants for the entire powertrain and the especially heat-resistant brake fluid by technology partner Motul.

As a result of the extensive modifications, the BRABUS 850 6.0 Biturbo engine delivers unrivalled performance figures. The engine produces its peak output of 625 kW / 850 HP (838 bhp) at a low 5,400 rpm. Even more massive is the peak torque of 1,450 Nm (1,069 lb-ft), which is on tap between 2,500 and 4,500 rpm. In the interest of the longevity of the entire powertrain, the peak torque is electronically limited in the car to 1,150 Nm (848 lb-ft).

The power is transferred to the wheels by the 4MATIC all-wheel-drive system and a seven-speed automatic transmission whose gears can also be shifted manually with the BRABUS RACE aluminum paddle shifters on the steering wheel.

The power unit in the bow elevates the BRABUS 850 6.0 Biturbo Cabrio to the position of the world’s most powerful and fastest four-seat all-wheel-drive cabriolet. From rest, the exclusive two-door car accelerates to 100 km/h (62 mph) in just 3.5 seconds and reaches a speed of 200 km/h (124 mph) after just 9.4 seconds. Due to tire limitations, the top speed is limited electronically to 350 km/h (217 mph).

These tremendously high speeds naturally place especially high demands on the aerodynamic-enhancement components, which were developed by the BRABUS designers in the wind tunnel. They are available for all S 63 and S 65 coupes and cabriolets. All bodywork components are manufactured from naked carbon with a high-gloss finishing coat.

2016 Mercedes-AMG S63 Cabriolet 850 By Brabus High Resolution Exterior
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The BRABUS front spoiler attaches to the front bumper and lends the two-door car full-blooded racing looks while reducing lift on the front axle at high speeds for further improved handling stability. Tailor-made carbon surrounds add even more striking emphasis to the large side air intakes in the front bumper. Naked carbon covers for the exterior mirrors add further, specifically sporty highlights.

The rear end of the open-top luxury liner also receives a visual upgrade. The BRABUS carbon diffusor provides the perfect backdrop for the two dual ceramic tailpipes of the BRABUS sport exhaust system. The BRABUS carbon rear spoiler on the trunk lid creates an aerodynamic balance between the front and rear axle. Carbon attachments for the side air outlets in the rear bumper round out the sporty lines perfectly.

A thrilling design, maximum quality and further enhanced driving dynamics are the outstanding traits of the BRABUS Monoblock wheels, which are available for the Mercedes S-Class Cabriolet in various sizes with diameters between 18 and 22 inches.

To be able to enjoy the enormous performance including the phenomenal top speed of the BRABUS 850 6.0 Biturbo variant to its full extent, the high-performance cabriolet is fitted with BRABUS Monoblock “PLATINUM EDITION” 21-inch forged wheels, which come in various designs. The use of state-of-the-art forging technology in their production results in an optimal combination of maximum strength and low weight. The wheels are mounted in sizes 9Jx21 on the front axle and 10.5Jx21 at the rear to make full use of the available space in the wheel wells. BRABUS selected Continental, Pirelli and YOKOHAMA high-performance tires of sizes 255/35 ZR 21 at the front and 295/30 ZR 21 on the rear axle as the optimal solution.

In addition, a BRABUS 22-inch tire/wheel combination is optionally available. The BRABUS Monoblock G “Platinum Edition” forged wheels of size 9Jx22 on the front axle are shod with size 255/30 ZR 22 tires, the size 10Jx22 wheels at the rear are fitted with tires of size 295/25 ZR 22.

The BRABUS lowering module is specifically calibrated to the use of these ultra-low-profile tires. It lowers the ride height of the open-top 2+2-seater by about 15 millimeters (.6 in).

BRABUS also refines the interior of the S-Class Cabriolet by customer request. This includes scuff plates with backlit BRABUS logo, whose colors change in sync with the various colors of the ambient interior lighting, and BRABUS genuine carbon interior components, which replace the production wood inlays and trim strips in the cockpit. Aluminum components such as the BRABUS RACE paddle shifters, pedals and door pins add markedly sporty highlights. The BRABUS speedometer with 400-km/h (250-mph) matches the tremendous performance potential of the vehicle.

2016 Mercedes-AMG S63 Cabriolet 850 By Brabus High Resolution Exterior
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The company upholstery shop has just the right thing for customers looking for an even more customized interior. A BRABUS fine leather captivates not only with its practically endless variety of colors and materials, but above all with its outstanding quality of workmanship.

The BRABUS 850 6.0 Biturbo Cabrio is available as a complete car or can be built on the basis of any current Mercedes S 63 Cabriolet.

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