Excellence – Wing/Pylon, Bremen is responsible for the design and manufacture of high-lift systems for the wings of Airbus aircraft. The entire process chain for the high-lift elements is established here, including the project office, technology engineering, flight physics, system engineering, structure development, verification tests, structural assembly, wing equipping and ultimate delivery to the final assembly line. In addition, Bremen manufactures sheet metal parts like clips and thrust crests for all Airbus aircraft as part of the Centre of Excellence – Fuselage and Cabin. In Bremen there is a plant of EADS Astrium and the headquarters of OHB-System, respectively the first and the third space companies of European Union. There is also a Mercedes-Benz factory in Bremen, building the C, CLK, SL, SLK, and GLK series of cars. Beck & Co's headlining brew Beck's and St Pauli Girl beers are brewed in Bremen. In past centuries when Bremen's port was the "key to Europe", the city also had a large number of wine importers, but the number is down to a precious few. Apart from that there is another link between Bremen and wine: about 800 years ago, quality wines were produced here. The largest wine cellar in the world is located in Bremen (below the city's main square), which was once said to hold over 1 million bottles, but during WWII was raided by occupying forces. A large number of food producing or trading companies are located in Bremen with their German or European headquarters: Anheuser-Busch InBev (Beck's Brewery), Kellogg's, Kraft Foods (Kraft, Jacobs Coffee, Milka Chocolate, Milram, Miràcoli), Frosta (frosted food), Nordsee (chain of sea fast food), Melitta Kaffee, Eduscho Kaffee, Azul Kaffee, Vitakraft (pet articles and food for cats, dogs, birds, fish, rodents and other pets), Atlanta AG (Chiquita banana), chocolatier Hachez (fine chocolate and confiserie), feodora chocolatier. Bremer Woll-Kämmerei (BWK), a worldwide operating company for manufacturing wool and trading in wool and similar products, is headquartered in Bremen. Gleistein is a German cordage factory with head office in Bremen. Transport Bremen has an international airport situated south of the city centre. Trams in Bremen and local bus services are offered by the Bremer Straßenbahn AG (translates from German as Bremen Tramways Corporation), often abbreviated BSAG, the public transport provider for Bremen. The Bremen S-Bahn covers the Bremen/Oldenburg Metropolitan Region, from Bremerhaven in the north to Twistringen in the south and from Oldenburg in the west, centred