Mercedes-Benz R 231

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Mercedes Benz
Mercedes-Benz SL 350, open (2012-2016)
Mercedes-Benz SL 350, open (2012-2016)
R 231
Sales designation: SL
Production period: 03 / 2012-06 / 2020
Class : Sports car
Body versions : Roadster
Engines: Petrol engines :
3.0–6.0 liters
(225–463 kW)
Length: 4612-4640 mm
Width: 1877 mm
Height: 1308-1315 mm
Wheelbase : 2585 ​​mm
Empty weight : 1685-1950 kg
Previous model Mercedes-Benz R 230

The Mercedes-Benz R 231 is a roadster from the German car manufacturer Daimler . It represents the sixth generation of the SL and replaces the predecessor R 230 , which had been in production for eleven years . It was produced in the Mercedes-Benz plant in Bremen . The vehicle was first presented to the world on December 15, 2011. It celebrated its official world premiere at the North American International Auto Show in January 2012 and entered the European market on March 31, 2012. The base price for the SL 350 was 93,534 euros when it was launched .

design

Exterior

Rear view

In contrast to the previous model changes of the SL , the replacement of the R 230 by the R 231 did not involve any such radical changes as, for example, when the R 230 appeared in 2001. The classic proportions of a roadster, which make up a long bonnet and a short rear end, were also retained in the seventh generation. At the front, the radiator grille, which is no longer optically integrated into the bonnet, but designed separately, is now upright. The Mercedes-Benz brand logo is integrated into the radiator grille with just one central strut. Compared to its predecessor, the headlights were placed further out, but kept their inclined position. The daytime running lights in the form of LED daytime running light strips are now also located in the outer areas of the bumper on the R 231 . The sideline only rises slightly towards the rear. The side air inlet on the fender has been enlarged slightly compared to the previous model. The stern has been changed less. The LED rear lights have been enlarged slightly and their upper end now protrudes further into the side. In contrast to its predecessors, the rear-view mirrors with integrated indicators are located on the door flanks, as in the CLS .

interior

Instrument panel and steering wheel of the R 231

The interior of the roadster has a leather-covered three-spoke steering wheel with aluminum double struts. The instrument cluster is also new, and although it still has two clearly drawn, analog round instruments, each with an additional small round instrument, there is now an 11.4 cm multifunction display between them. A large decorative element is now attached to the instrument panel, which is intended to increase the quality. The central display of the navigation system with a diagonal of 17.8 cm, which is located between two ventilation nozzles in cross design made of aluminum, which borrows from the SLS AMG , is now integrated into the upper part of the instrument panel. Below the screen there is a control unit that flows up to the armrest and consists of two separate compartments; starting at the top with the operation of the radio and the navigation system and below the climate control. The control buttons are made of aluminum. The radio and navigation system are operated using a rotary and push button located in front of the center armrest. Next to it is the now much smaller automatic selector lever.

Equipment and packages

Standard equipment

Intelligent Light System

The SL has ASR , ABS , BAS , ESP , the 7-speed automatic transmission 7G-Tronic Plus with a shift point display and the automatic start-stop system ECO start-stop , crash-responsive Neck-Pro headrests and six airbags - two-stage driver airbags and front passenger, two sidebags that protect the torso during a side impact, and two headbags in the doors that cover the side head impact area, on impact by 85 mm lifting active bonnet, the drowsiness detection system Attention Assist , Hill Start Assist, an electric parking brake and the radio Comand . As of the SL 500 model , the Comand 3D multimedia system , which includes Linguatronic voice control , is standard. This also has internet access. Direct steering with a safety steering column that is height and length adjustable and the two-zone automatic air conditioning are also standard. In addition, this model is equipped with an adaptive and flashing brake light and the brake system named by Mercedes-Benz Adaptive Brake . The headlights assistant, bi-xenon headlights with the Intelligent Light System , LED rear lights, daytime running lights and a cruise control with variable speed limitation Speedtronic with brake intervention are also part of the series. There is also a heated rear window, heat-insulating green glass, heated exterior mirrors, a rain sensor, eight loudspeakers with a Frontbass system, a chassis with an adaptive damping system, the Pre-Safe occupant protection system and the so-called Torque Vectoring Brake , a braking system that intervenes on one side of the rear wheel on the inside of the curve to prevent understeering, included in the series.

Special equipment

The Active Body Control chassis, multifunction steering wheel in leather / wood design, the Airscarf neck-level heating , a panoramic roof (standard from December 2012), which is also available with Magic Sky Control on request , an electric wind deflector are available as special equipment Six-disc DVD changer and a TV tuner offered. In addition, the Harman Kardon Logic 7 surround sound system with 14 loudspeakers and an output of 600 watts and the Bang & Olufsen BeoSound AMG surround sound system with twelve loudspeakers, two tweeters and a total output of 900 watts, an active parking assistant and that Keyless-Go access system , which includes hands-free and contact-free opening of the trunk and, for the first time in a vehicle, the same locking process. There is also a variety of assistance systems such as Distronic Plus, an active lane keeping and active blind spot assistant as well as various leather upholstery, aluminum and wooden trim strips.

Packages and special models

AMG sports package

The AMG sports package is available as an option, comprising a front and rear apron and side skirts in AMG design and high-sheen 19-inch AMG light-alloy wheels in 5-spoke design. On the technical side, vehicles with this package differ in that they have a sports chassis that is 10 mm lower, which can also be deselected, and a larger brake system with perforated brake discs. In the interior, this package is distinguished by the design of the seats and (optional) piping in white Designo leather. Furthermore, the covers AMG Sports package black floor mats of AMG and a perforated multifunction sports steering wheel with shift paddles.

Edition 1 special model

The Edition 1 special model , which includes the AMG sports package and is also equipped with a panoramic glass roof, will be available for the market launch. In the interior, the dashboard, steering wheel and seats are covered in red (classic red) or white (deep white) designo leather. This package also includes the Harman Kardon Logic 7 surround sound system , aluminum trim, ambient lighting and Airscarf headspace heating .

Special model SL and SL AMG 2LOOK Edition

The “2LOOK Edition” special model will be available from spring 2014. The "2LOOK Edition" relies on the deliberate play with color contrasts: The SL (P38, available as SL 350 or SL 500) is designed with a magnetite black metallic exterior and various platinum white elements in the interior, the SL AMG (P42, as SL 63 AMG or SL 65 AMG) is painted in cashmere white magno and a vario-roof in high-gloss black. In addition, matt black forged 10-spoke forged wheels or various add-on parts up to the black chrome-plated AMG sports exhaust system set accents.

Grand Edition special model

The special “Grand Edition” model was presented at the 89th Geneva Motor Show in March 2019.

Innovations

Frontbass system

In the R 231 , a new speaker architecture finds its origin. The cavities of the aluminum construction on the side member are used as a resonance space for amplifiers and sound bodies, which should lead to an improved sound. Due to the changed arrangement, there are now more storage options in the door instead of the woofers.

Magic Sky Control

After the SLK ( R 172 ), the Magic Sky Control mentioned by Mercedes-Benz will also be available in the R 231 . This is a switchable glass roof that originated in the Maybach . The difference to normal glass roofs is that the Magic Sky Control keeps the heat and rays of the sun out of the interior; it can also be darkened or lightened in a variable manner. When the mode is switched on, the temperature on interior parts such as armrests is up to 10 degrees Celsius below the values ​​with conventional green glass. The roof works through the physics of a plate capacitor: If an electrical voltage is applied to the glass structure, particles in the glass structure align themselves so that light can penetrate the pane. If, however, the voltage remains switched off, the particles remain randomly aligned. This partially blocks the light and the lens stays dark. Accordingly, the interior heats up less and the air conditioning is relieved when the roof is switched to dark.

Hold

In the "R231", as with the previous model "R230", there is the possibility of reaching the trunk more easily with the top down by lifting the roof in the rear at the push of a button. Here, when the tailgate is open, the convertible top folds up, providing a larger opening to the cargo area.

Technical specifications

Mercedes-Benz SL 63 AMG
Mercedes-Benz SL 65 AMG 45th ANNIVERSARY

Engines

At the market launch at the end of March 2012, there was a choice of two engines, including a 3.5-liter V6 gasoline engine with direct injection ( SL 350 ), which has an output of 225 kW (306 hp), and a 4.7-liter V8 Otto engine, which is equipped with two turbochargers and direct injection and thus comes to an output of 320 kW (435 hp) ( SL 500 ). In May, the engine range was expanded to include the SL 63 AMG , which developed 395 kW (537 hp) from a 5.5-liter V8 gasoline engine with direct injection and biturbo charging. In addition, the SL 65 AMG appeared in September , a 6.0-liter V12 gasoline engine with biturbo charging and an output of 463 kW (630 hp). From June 2014, the 3.0-liter V6 gasoline engine with direct injection and two turbochargers in the SL 400 will replace the previous entry-level engine in the SL 350 . At the same time, the output of the SL 63 AMG is increased to 430 kW (585 hp).

Parameters SL 350 SL 400 SL 500 SL 63 AMG SL 65 AMG
Construction period 03 / 2012–05 / 2014 06 / 2014–03 / 2016 04/2016–07/2018 07 / 2018–06 / 2020 03 / 2012–05 / 2015 06 / 2015–07 / 2018 07 / 2018–06 / 2020 05 / 2012–05 / 2014 07 / 2018–05 / 2019 06 / 2014–07 / 2018 09 / 2012–07 / 2018
Engine characteristics
Motor designation * M 276 DE 35 M 276 DE 30 AL M 278 DE 46 AL M 157 DE 55 AL M 279 E 60 AL
Engine type V6 petrol engine V8 petrol engine V12 petrol engine
Mixture preparation Direct injection Manifold injection
Engine charging - Biturbo
Displacement 3498 cc 2996 cc 4663 cc 5461 cc 5980 cc
Max. power 225 kW (306 hp) at 6500 rpm 245 kW (333 hp) at 5250-6000 rpm 270 kW (367 hp) at 5500-6000 rpm 320 kW (435 hp) at 5250 rpm 335 kW (455 hp) at 5250 rpm 395 kW (537 PS) at 5500 rpm
[415 kW (564 PS) at 5500 rpm] 1
420 kW (571 hp) at 5500 rpm 430 kW (585 hp) at 5500 rpm 463 kW (630 hp) at 4800-5400 rpm
Max. Torque 370 Nm at 3500-5250 rpm 480 Nm at 1600-4000 rpm 500 Nm at 2000-4200 rpm 500 Nm at 1800-4500 rpm 700 Nm at 1800-3500 rpm 800 Nm at 2000–4500 rpm
[900 Nm at 2250–3750 rpm] 1
900 Nm at 2250-3750 rpm 1000 Nm at 2300-4300 rpm
Power transmission
Drive, as standard Rear wheel drive
Gearbox, as standard 7-speed automatic (7G-TRONIC Plus) Nine-stage automatic (9G-Tronic) 7-speed automatic (7G-TRONIC Plus) 7-speed automatic (7G-TRONIC Plus) /
nine-speed automatic (9G-Tronic) 2
Nine-stage automatic (9G-Tronic) AMG SPEEDSHIFT MCT 7-speed sports transmission AMG SPEEDSHIFT PLUS 7G-TRONIC
Readings
Top speed 250 km / h 250 km / h
[300 km / h] 1
250 km / h 250 km / h
[300 km / h] 1
Acceleration, 0-100 km / h 5.9 s 5.2 s 4.9 s 4.6 s 4.3 s 4.3 s
[4.2 s] 1
4.1 s 4.0 s
Fuel consumption over 100 km (combined) 6.8–7.5 l super 7.3–7.7 l super 7.7 l super 8.2–8.4 l super 9.1–9.2 l super 9.0 l super 9.8 l super 9.9 l super 11.6 l super 9.9 l super 11.6 l super plus
CO 2 emissions (combined) 159-176 g / km 172-179 g / km 175 g / km 188-191 g / km 212-214 g / km 205 g / km 223 g / km 231 g / km 264 g / km 231 g / km 270 g / km
Emission standard according to EU classification 5 euro Euro 6 Euro 6d-TEMP 5 euro Euro 6 Euro 6d-TEMP 5 euro Euro 6d-TEMP Euro 6

 * The engine designation is coded as follows: M = engine, OM = oil engine, series = 3 digits, E = intake manifold injection, KE = port injection, DE = direct injection, ML = compressor, L = charge air cooling, A = exhaust gas turbocharger, red. = reduced performance / displacement, LS = performance increase

1with AMG Performance Package
2 7-speed automatic transmission with Tippshift and automatic start-stop until 03/2016, 9-speed automatic transmission with Tippshift and automatic start-stop from 04/2016

transmission

All models are either equipped with a 7-speed converter automatic transmission (7G-TRONIC Plus) or a 9-speed automatic transmission. An automatic start-stop system is standard. A distinction is made between two types of transmission in the AMG models: the AMG SPEEDSHIFT MCT 7-speed sports transmission is installed in the SL 63 AMG , in which the conventional torque converter has been replaced by a wet start-up clutch running in an oil bath. Thanks to its low rotational inertia, the gearbox acts extremely spontaneously, dynamically and without the losses that are typical of converters. When the SL 65 AMG , the transmission is AMG Speedshift Plus 7G-Tronic use. A large spread ensures a significantly lower speed level. It is designed for maximum shift comfort, but also guarantees a sporty, agile gear change. A new fuel economy converter, bearings with reduced friction and the transmission oil heat management increase the efficiency of the power transmission even more.

steering

All models in the R 231 series have electromechanical direct steering with speed-dependent power steering, also known as parameter steering, which is installed as standard in higher-priced Mercedes models. The ratio changes over the entire steering wheel angle. As the steering wheel turns, the translation becomes more direct, reducing the steering wheel movements when parking or driving through a roundabout. The turning circle is around eleven meters.

landing gear

A chassis with an adaptive damping system is used as standard on the R 231 . This adapts the damping force of each individual wheel to the road conditions and driving style. These adjustments take place within a stepless damping map. The basic setting of the damping system - sportily firm or comfortably soft - can be determined by the driver. The Active Body Control active suspension system is also available on request . This is an electro-hydraulically controlled active chassis based on steel springs, which is intended to compensate for rolling and pitching movements.

Brakes

Composite braking system

The R 231 has four-piston fixed caliper brakes in aluminum monoblock design at the front and single-piston combination sliding calipers made of aluminum at the rear. The disc brakes are internally ventilated all around and additionally perforated on the front axle. The SL 350 has brake discs with a diameter of 342 mm at the front and 320 mm at the rear. The SL 500 uses 360 mm brake discs at the front and 320 mm at the rear. In the SL 63 AMG and SL 65 AMG , a high-performance composite brake system with 390 mm composite discs with six-piston fixed calipers is used on the front axle, while on the rear axle there are instead 360 mm integral discs with single-piston floating calipers. The ceramic high-performance composite brake system from the SLS AMG is also available on request for these two models .

body

When developing the R 231, Mercedes-Benz set itself the goal of significantly reducing weight. For the first time, a body-in-white made almost entirely of aluminum is used in the SL . Due to the high proportion of light metal, its weight has been reduced by around 110 kg to 254 kg compared to the previous model. Furthermore, the stiffness of the vehicle is increased through the use of aluminum. Exceptions are the roof frame around the windshield, which is still made of steel, and the trunk lid, which is made of a mixture of plastic and steel. These measures enabled the total weight of the finished vehicle to be reduced by up to 140 kg.

By optimizing the body design, the drag coefficient could also be reduced. The SL 350 value = 0.27, making it the most aerodynamically efficient roadster of its time.

Overall, the R 231 grew in all dimensions. In terms of overall length, the roadster grew by 5.5 cm to 4.62 m compared to the previous model, and the wheelbase was increased by 1.5 cm to 2.59 m. Both the front and rear overhangs have been increased by around 1.3 cm. The width of the R 231 increased by 5.7 cm to around 1.88 m. If the side mirrors are included in these calculations, the vehicle widened to 2.10 m (+ 3 cm). This also made the interior larger. Overall, the interior widened by 2.8 cm.

The fully electric vario-roof of the R 231 opens and closes in a little less than 20 seconds. When the top is closed, the trunk volume is 381 liters; if this is opened, 241 liters are available.

Web links

Commons : Mercedes-Benz R 231  - Collection of Pictures, Videos and Audio Files

Individual evidence

  1. Andreas Of: Mercedes SL Grand Edition special model: Roadster with AMG wheels and Designo leather. In: auto-motor-und-sport.de. February 20, 2019, accessed March 18, 2019 .
  2. a b Mercedes SL at the Detroit Motor Show: aluminum sports car with magic wiper auto-motor-und-sport.de, November 16, 2011
  3. Variable transparency at the push of a button / series start planned for 2011: Mercedes develops switchable glass roof autokiste.de, April 23, 2010
  4. Archived copy ( Memento of the original from May 22, 2012 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. @1@ 2Template: Webachiv / IABot / www.presseportal.de
  5. http://www.atzonline.de/Aktuell/Galerie/1213/6/inc.html  ( page no longer available , search in web archivesInfo: The link was automatically marked as defective. Please check the link according to the instructions and then remove this notice.@1@ 2Template: Dead Link / www.atzonline.de  
  6. First details about the next SL: Magic Vision Control - aluminum body with 254 kg weight saving blog.mercedes-benz-passion.com, November 16, 2011