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30-529: The former name "SLK" was derived from sportlich (sporty), leicht (lightweight), and kurz (short). With the release of the facelift R172 in 2016, the SLK-Class was renamed to SLC-Class in accordance with the revised nomenclature adopted by Mercedes. Under this scheme, roadsters use the base name "SL", followed by the model's placement in Mercedes-Benz hierarchy, the letter "C", being the roadster equivalent to

60-420: A high-pressure pump stores a reservoir of fuel at high pressure — up to and above 2,000 bars (200 MPa; 29,000 psi). The term "common rail" refers to the fact that all of the fuel injectors are supplied by a common fuel rail which is nothing more than a pressure accumulator where the fuel is stored at high pressure. This accumulator supplies multiple fuel injectors with high-pressure fuel. This simplifies

90-508: A low-pressure fuel pump feeding unit injectors (or pump nozzles). High-pressure injection delivers power and fuel consumption benefits over earlier lower pressure fuel injection, by injecting fuel as a larger number of smaller droplets, giving a much higher ratio of surface area to volume. This provides improved vaporization from the surface of the fuel droplets, and so more efficient combining of atmospheric oxygen with vaporized fuel delivering more complete combustion . Common rail injection

120-445: A modern incarnation of the 1950s Mercedes-Benz 190SL , by returning to four cylinders and with an identical 94-inch (2,400 mm) wheelbase. A facelift was introduced to all models in 2000, featuring an updated design and updated engines. The R171 SLK was unveiled at the 2004 Geneva Motor Show . It features increased use of high-strength steel, and improvements to the car's torsional strength and aerodynamic efficiency. Models feature

150-582: A more compact, revised roof mechanism that is operated in 22 seconds (previously 25 seconds), resulting in an increase in boot capacity by 63 liters (2.2 cu ft). The R171 also introduced the Airscarf system that integrates neck-level heating system into the headrests of the car. The front-end design of the car was inspired by the noses found in Formula One cars. It was facelifted in 2008 and featured new engines and minor exterior design changes. The R172 SLK

180-538: A range of inline-four and V6 petrol engines and inline-four and -five diesels, later W203's received the V6 diesel. Most of the engines were carried over from the W202, but the C320 was exclusive, offering 160 kW (215 hp; 218 PS). The diesels now featured common rail direct fuel injection and variable geometry turbochargers . A six-speed manual gearbox was optional on some of

210-454: A revised design. In 2020, Mercedes-Benz released a Final Edition to commemorate the end of the car's production run. The following are the sales figures for the SLK-Class since 2001: Mercedes-Benz C-Class The Mercedes-Benz C-Class is a series of compact executive cars produced by Mercedes-Benz Group AG . Introduced in 1993 as a replacement for the 190 (W201) range, the C-Class

240-560: A stiffer body/shell and a design inspired by the W221 S-Class with some influences from the C219 CLS-Class . The C-Class received a facelift in 2011 for the 2012 model year including new LED taillights, a revised dashboard and instrument cluster layout, and a revised front fascia and headlights. The W204 platform continued into 2015 with the C-Class coupe. The final farewell of the W204, and also

270-401: A temperature near 130 °C). Common rail engines have been used in marine and locomotive applications for some time. The Cooper-Bessemer GN-8 ( circa 1942) is an example of a hydraulically operated common rail diesel engine, also known as a modified common rail. The common rail system prototype for automotive engines was developed in the late 1960s by Robert Huber of Switzerland, and

300-458: A very short to no heating-up time, depending on the ambient temperature, and produce lower engine noise and emissions than older systems. Diesel engines have historically used various forms of fuel injection. Two common types include the unit-injection system and the distributor/inline-pump systems . While these older systems provide accurate fuel quantity and injection timing control, they are limited by several factors: In common rail systems,

330-490: Is widely used in diesel engines . It is also the basis of gasoline direct injection systems used on petrol engines . In 1916 Vickers pioneered the use of mechanical common rail systems in G-class submarine engines. For every 90° of rotation, four plunger pumps allowed a constant injection pressure of 3,000 pounds per square inch (210 bar; 21 MPa), with fuel delivery to individual cylinders being shut off by valves in

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360-453: The Audi A8 ). The main suppliers of modern common rail systems are Bosch , Delphi Technologies , Denso , and Siemens VDO (now owned by Continental AG ). The automotive manufacturers refer to their common rail engines by their own brand names: Solenoid or piezoelectric valves make possible fine electronic control over the fuel-injection time and quantity, and the higher pressure that

390-518: The C-Class . The R170 Mercedes SLK was the first generation compact roadster produced by Mercedes-Benz , from 1995 to 2004. It was designed from late 1991 under Bruno Sacco , with a final design being completed in early 1993 and approved by the board, with a German design patent filed on September 30, 1993. The production SLK-Class was introduced at the Turin Motor Show on 22 April 1996, appearing as

420-566: The 1990s by Magneti Marelli , Centro Ricerche Fiat in Bari , and Elasis, with further development by physicist Mario Ricco Fiat Group . Unfortunately Fiat were in a poor financial state at this time, so the design was acquired by Robert Bosch GmbH for refinement and mass production. The first passenger car to use this system was the 1997 Alfa Romeo 156 with a 2.4-L JTD engine , and later that same year, Mercedes-Benz introduced it in their W202 model. In 2001, common rail injection made its way into

450-420: The 2018 Geneva Motor Show, including exterior changes and new engines. The W206 C-Class was unveiled on 23 February 2021. In China, the C-Class was launched in a long-wheelbase version (V206). For the first time, all W206 C-Class models are equipped with four-cylinder engines coupled with an integrated starter generator (15 kW electric motor) and a 48-volt electrical system. The C-Class All-Terrain (X206)

480-547: The 6.6 liter Duramax LB7 V8 used in the Chevrolet Silverado HD and GMC Sierra HD. In 2003 Dodge and Cummins launched common rail engines, and Ford followed in 2008 with the 6.4L Powerstroke. Today almost all non-commercial diesel vehicles use common rail systems. The common rail system is suitable for all types of road cars with diesel engines, ranging from city cars (such as the Fiat Panda ) to executive cars (such as

510-594: The A-Class. Styling themes were carried over from the previous W201 series, but the new series had a smoother and rounder design than the last generation of compact Mercedes, with styling cues from the W124 E-Class (short, high trunk and taller tail lights), W140 S-Class (front end), and R129 SL-Class (headlights). The second generation C-Class was introduced in March 2000 and production began on 18 July 2000. The sedan debuted with

540-508: The common rail technology makes available provides better fuel atomisation . To lower engine noise , the engine's electronic control unit can inject a small amount of diesel just before the main injection event ("pilot" injection), thus reducing its explosiveness and vibration, as well as optimising injection timing and quantity for variations in fuel quality, cold starting, and so on. Some advanced common rail fuel systems perform as many as five injections per stroke. Common rail engines require

570-433: The injector lines. From 1921 to 1980 Doxford Engines used a common rail system in their opposed-piston marine engines , where a multicylinder reciprocating fuel pump generated a pressure around 600 bars (60 MPa; 8,700 psi), with fuel stored in accumulator bottles. Pressure control was achieved by an adjustable pump discharge stroke and a "spill valve". Camshaft-operated mechanical timing valves were used to supply

600-660: The naturally aspirated V8, was in the Edition 507 model. This had increased power, lightweight wheels and the vented hood from the Black Series. The W205 C-Class was launched at the 2014 North American International Auto Show . The new structure was significantly lighter using aluminium and high-strength steel extensively throughout the body, resulting in a 100-kilogram (220 lb) weight decrease. The Mercedes-Benz C-Class 205 chassis spawned four C-Class bodystyles; sedan (W205), wagon (S205), coupe (C205), and cabriolet (A205). The car

630-410: The purpose of the high-pressure pump in that it only needs to maintain a target pressure (either mechanically or electronically controlled). The fuel injectors are typically controlled by the engine control unit (ECU). When the fuel injectors are electrically activated, a hydraulic valve (consisting of a nozzle and plunger) is mechanically or hydraulically opened and fuel is sprayed into the cylinders at

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660-610: The range, With exception to the C320 and C32 AMG. Notably (post 2005), for the first time, the number designations were no longer equivalent to the engine displacement, more specifically in the Mercedes C200 (1.8-litre), C240 (2.6-litre) and C200 CDI (2.2-litre). DaimlerChrysler introduced the W204 C-Class on 18 January 2007 and displayed it in the 2007 Geneva Auto Show . Sales started on 31 March 2007 in almost all European countries. The new family had an extended wheelbase and tracks,

690-442: The spring-loaded Brice/CAV/Lucas injectors, which injected through the side of the cylinder into the chamber formed between the pistons. Early engines had a pair of timing cams, one for ahead running and one for astern. Later engines had two injectors per cylinder, and the final series of constant-pressure turbocharged engines was fitted with four. This system was used for the injection of both diesel and heavy fuel oil (600cSt heated to

720-640: The technology was further developed by Dr. Marco Ganser at the Swiss Federal Institute of Technology in Zurich, later of Ganser-Hydromag AG (est. 1995) in Oberägeri. The first common-rail-Diesel-engine used in a road vehicle was the MN 106-engine by East German VEB IFA Motorenwerke Nordhausen . It was built into a single IFA W50 in 1985. Due to a lack of funding, the development was cancelled and mass production

750-404: Was later renamed to Mercedes-Benz CLC-Class . It remained in production until 2011 when a new W204 C-Class coupé replaced it for the 2012 model year. In May 1993, the first generation W202 C-Class was introduced as a replacement for the 190. The first C-Class (W202) sedan was manufactured on 1 June 1993. The C-Class sedan was the company's entry-level model up until 1997 when Mercedes launched

780-689: Was never achieved. The first successful mass production vehicle with common rail, was sold in Japan in 1995. Dr. Shohei Itoh and Masahiko Miyaki of the Denso Corporation developed the ECD-U2 common rail system, mounted on the Hino Ranger truck. Denso claims the first commercial high-pressure common rail system in 1995. Modern common rail systems are governed by an engine control unit , which controls injectors electrically rather than mechanically. Prototyped in

810-613: Was officially unveiled on 16 December 2013. W205 production commenced on 4 February 2014 at the Bremen plant. Production was also undertaken at Mercedes-Benz plants in East London (South Africa), Iracemápolis (Brazil) and Tuscaloosa, Alabama (United States). European sales began in March 2014, while the vehicle went on sale in North America in September 2014. A mid-life update made its debut at

840-453: Was released as an off-road focused, crossover -inspired estate model. The model received external body cladding, a 40 mm increase in ride height, 4Matic AWD and additional drive modes. Press Kit (2011–): Common rail Common rail direct fuel injection is a direct fuel injection system built around a high- pressure (over 2,000  bar or 200  MPa or 29,000  psi ) fuel rail feeding solenoid valves , as opposed to

870-456: Was released in 2011. It was available with a range of inline-four , V6 , and V8 , diesel and petrol engines, and introduced an electronically operated window tint shade for the sunroof, called Magic Sky Control. A facelift was released for vehicles produced from March 2016, to coincide with the 20th anniversary of the SLK-Class. The model range was also renamed to SLC-Class to conform to the new Mercedes nomenclature, and introduced new engines and

900-456: Was the smallest model in the marque's line-up until the W168 A-Class arrived in 1997. The C-Class has been available with a " 4MATIC " four-wheel drive option since 2002. The third generation (W204) was launched in 2007 while the current W206 generation was launched in 2021. Initially available in sedan and a station wagon configurations, a fastback coupé (SportCoupé) variant followed and

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