Question: What German automotive marque does the high-performance aftermarket tuning company Brabus specialize in?

full_context: Document 1: Smart electric drive: The Smart Fortwo electric drive, or smart ed, is a battery electric vehicle variant of the Smart Fortwo city car, formerly marketed as the Smart Fortwo EV. Field testing began in London with 100 units in 2007. The second generation was introduced in 2009 and was available in 18 markets around the world for leasing or through the Car2Go carsharing service in selected cities, with over 2,300 units delivered. A near production version was unveiled at the September 2011 Frankfurt Motor Show.
Document 2: Mann+Hummel: The Mann+Hummel Group is a German manufacturing company and leading global filtration specialist headquartered in Ludwigsburg within the metropolitan area of Stuttgart. The company develops, produces and distributes liquid and air filter systems, intake systems and thermal management components. Additional products include powertrain and engine plastic components, such as manifolds, ducts and cylinder head covers with integrated functions for the automotive industry, and aftermarket filter elements for the maintenance and repair of motor vehicles under several brands (MANN-FILTER, WIX Filters, FILTRON, PUROLATOR). For general engineering, process engineering and industrial manufacturing sectors the product range includes industrial filters, membrane filters and equipment for water filtration. About 90 percent of annual sales of around 3,5 billion euros accounted for by the activity in the automotive industry. The company and its subsidiaries have more than 80 locations worldwide. The group is owned by the families of the two founders.
Document 3: Brabus Rocket: The Brabus Rocket produced since 2006, is a series of modified vehicles produced by Brabus, a German high-performance vehicle company.
Document 4: Brabus E V12: The Brabus E V12 is a tuned Mercedes-Benz E-Class made by Mercedes-Benz tuning company Brabus. It was succeeded by the Brabus Rocket which is based on the Mercedes-Benz CLS.
Document 5: Smart Fortwo: The Smart Fortwo is a rear-engine, rear-wheel-drive, 2-seater hatchback Microcar(or City car) manufactured and marketed by the Smart division of Daimler AG, introduced in 1998, now in its third generation. Marketed in 46 countries worldwide, Fortwo production had surpassed 1.7 million by early 2015.
Document 6: Car2Go: car2go is a German car rental company. It is a subsidiary of Daimler AG providing carsharing services in European and North American cities. The company offers exclusively Smart Fortwo and Mercedes-Benz vehicles and features one-way point-to-point rentals. Users are charged by the minute, with hourly and daily rates available. The service forgoes the typical centralized rental office, and cars are user-accessed via a downloadable smartphone app wherever they are parked. As of July 2017, car2go is the largest carsharing company in the world with 2,500,000 registered members and a fleet of nearly 14,000 vehicles in 26 locations in North America, Europe and Asia.
Document 7: Audi Performance and Racing: APR LLC is an American automotive engineering and motorsport company that offers aftermarket performance products for cars built by the Volkswagen Group, including Audi, Porsche, SEAT, Škoda and Volkswagen. Audi Performance & Racing was founded in 1997 by Brett Augsburger and Stephen Hooks, automotive engineers looking to offer aftermarket upgrades for Volkswagen Auto Group cars. Their first product was a ECU software upgrade for the 1997 Audi A4 1.8T, but the company soon expanded its product line to include exhaust and turbo systems. APR engine tuning products use proprietary software for reading and writing to Bosch Motronic engine control units.
Document 8: Gemballa: Gemballa is a tuning company based in Leonberg near Stuttgart, Germany, which was founded by and named after Uwe Gemballa in 1981. They provided aftermarket parts mainly for Porsche. In May 2010, the Gemballa factory was seized by German authorities and shut down following the disappearance of Uwe Gemballa who was later found dead. CEO Andreas Schwarz and investor Steffen Korbach were able to buy the brand rights and name rights from Gemballa in August 2010 under the new name GEMBALLA GmbH.In 2016 Steffen Korbach became the sole CEO of the company and Alexander Schwarz stepped down. Reportedly Korbach also took over the shares in the company from his former partner Schwarz.
Document 9: Daimler AG: Daimler AG (] ) is a German multinational automotive corporation. Daimler AG is headquartered in Stuttgart, Baden-Württemberg, Germany. As of 2014, Daimler owns or has shares in a number of car, bus, truck and motorcycle brands including Mercedes-Benz, Mercedes-AMG, Smart Automobile, Detroit Diesel, Freightliner, Western Star, Thomas Built Buses, Setra, BharatBenz, Mitsubishi Fuso, MV Agusta as well as shares in Denza, KAMAZ, Beijing Automotive Group. The luxury Maybach brand was terminated at the end of 2012, but revived in April 2015 as "Mercedes-Maybach" versions of the Mercedes-Benz S-Class and G-Class. In 2016 Daimler sold 3.0 million vehicles. By unit sales, Daimler is the thirteenth-largest car manufacturer and is the largest truck manufacturer in the world. In addition to automobiles, Daimler manufactures buses and provides financial services through its Daimler Financial Services arm. The company is a component of the Euro Stoxx 50 stock market index.
Document 10: Brabus: BRABUS GmbH, founded 1977 in Bottrop (Ruhr Area), Germany, is a high-performance aftermarket tuning company which specializes in Mercedes-Benz, Smart, Tesla and Maybach vehicles. Brabus became the largest Mercedes tuner, other than Mercedes-AMG which became a DaimlerChrysler affiliate in the 1990s.
Document 11: Porsche: Dr. Ing. h.c. F. Porsche AG, usually shortened to Porsche AG (] ), is a German automobile manufacturer specializing in high-performance sports cars, SUVs and sedans. Porsche AG is headquartered in Stuttgart, and is owned by Volkswagen AG, which is itself majority-owned by Porsche Automobil Holding SE. Porsche's current lineup includes the 718 Boxster/Cayman, 911, Panamera, Macan and Cayenne.
Document 12: Spiess Tuning: Spiess Tuning is the common identity of Siegfried Spiess Motorenbau GmbH, a motor vehicle engine tuning company based in Ditzingen, Baden-Württemberg, Germany. Today Spiess Tuning is most famous for its Formula 3 motor racing engines based on the Opel Family II and two iterations of Volkswagen R4 engines.
Document 13: Annette Winkler: Annette Winkler is the CEO and director of Smart Automobile, the division of Daimler AG noted for manufacturing and marketing the two-passenger Smart Fortwo and four-passenger Smart Forfour city cars.
Document 14: Smart Formore: The Smart Formore was a small all wheel drive SUV, riding on the same platform as the Mercedes-Benz C-Class. The architecture would be shared with the Mercedes-Benz GLK-Class, an SUV that is smaller than the M-Class. Power would have ranged from a 1.8 L straight-4 to a 3.0 L V6, including Diesel versions. Production was to have been carried out at DaimlerChrysler's factory in Juiz de Fora, Brazil, rather than the French Smartville factory.
Document 15: Smart (marque): smart Automobile (stylized and marketed as "smart") is a German automotive marque and division of Daimler AG, based in Böblingen, Germany. It ranges in microcars and subcompacts, primarily the Fortwo and Forfour with its primary assembly plants located in Hambach, France and Novo Mesto, Slovenia. Marketed in 46 countries in Asia, North and South America, Africa, Australia and Europe, production of the Fortwo had surpassed 1.7M units by early 2015.
ground_truth: Smart