Question: The Mercedes-Benz R107 and C107 are the second longest single series ever produced after a class of vehicle manufactured by who? 

Context paragraphs:
Mercedes-Benz R-Class: The Mercedes-Benz R-Class is a luxury multi-purpose vehicle introduced by Mercedes-Benz for the 2006 model year.  It is the first full-sized multi-purpose vehicle ever produced by Mercedes-Benz.  It was first seen at the 2002 Detroit Auto Show as the Vision GST ("Grand Sports Tourer") concept, and the final production vehicle was shown at the 2005 New York International Auto Show.  The R-Class was built on the W251 chassis, and was assembled in Vance, Alabama.  It was priced between the M-Class and the GL-Class.  It was initially marketed by Mercedes-Benz as a "Sports Cruiser" and later as a "Family Tourer".

Mercedes-Benz Antos: The Antos truck is a commercial vehicle manufactured by Mercedes-Benz.  It was announced in May 2012 with a formal launch scheduled for September 2012.

Chevrolet Eagle: The Chevrolet Eagle (Series CA) is an American vehicle manufactured by Chevrolet in 1933 to replace the 1932 Series BA Confederate.  The Eagle was produced early in the 1933 production year.  When it was joined by the cheaper Mercury later in 1933 the Eagle name was changed to Master to provide Chevrolet with a two-car range, and the first time in ten years they manufactured two models on different wheelbases.  The Mercury was also known as the Standard series.

Chevrolet Series AC International: The Chevrolet Series AC International is an American vehicle manufactured by Chevrolet in 1929 to replace the 1928 Series AB National.  In all, 847,053 Series ACs were manufactured in a range of ten body styles.  The Series AC was the first six-cylinder engine from Chevrolet since 1915, and was advertised as "A Six in the price range of the Four", and was only $10 more than the outgoing four-cylinder Series AB.

Amphicat: The Amphicat is a six-wheel-drive, skid steer amphibious all-terrain vehicle manufactured in the late 1960s through the early 1970s by Mobility Unlimited Inc. of Auburn Hills, Michigan.  The product line was purchased by Magna American (a division of Magna Corporation) which produced the vehicle in Raymond, Mississippi for several years.  The vehicle was also made in Canada by Behoo Industries and differed slightly from its American counterpart, mostly on the transom.

Mercedes-Benz R107 and C107: The Mercedes-Benz R107 and C107 are automobiles which were produced by Mercedes-Benz from 1971 through 1989, being the second longest single series ever produced by the automaker, after the G-Class.  They were sold under the SL (R107) and SLC (C107) model names as the 280 SL, 280 SLC, 300 SL, etc. up to the 560 SL.

Gran Hermano Argentina (season 6): The sixth season of Gran Hermano Argentina premiered on Sunday December 12, 2010 hosted by Jorge Rial.  For the first two weeks after the premiere, the Gala will be hosted by Marley due to Rial taking a holiday.  It began on 12 December 2010, and the prize money for the series is 400,000 Argentine pesos (100,680 USD).  The season ended on Sunday May 1, 2011 after lasting 141 days, becoming the longest series ever produced in the Americas.  Also, third place, Martín Anchorena became the housemate that has stayed the longest in a Big Brother house in the Americas by staying from Day 1 up to Day 141.

Mercedes-Benz G-Class: The Mercedes-Benz G-Class, sometimes called G-Wagen (short for "Geländewagen", "cross country vehicle"), is a mid-size four-wheel drive luxury SUV manufactured by Magna Steyr (formerly Steyr-Daimler-Puch) in Austria and sold by Mercedes-Benz.  In certain markets, it has been sold under the Puch name as Puch G.  The G-wagen is characterized by its boxy styling and body-on-frame construction.  It uses three fully locking differentials, one of the few vehicles to have such a feature.  Despite the introduction of an intended replacement, the unibody SUV Mercedes-Benz GL-Class in 2006, the G-Class is still in production and is one of the longest produced Mercedes-Benz in Daimler's history, with a span of 35 years.  Only the Unimog surpasses it.

Sungai Johor Bridge: The Sungai Johor Bridge (Malay: Jambatan Sungai Johor Jawi: جمبتن سوڠاي جوهر) is an expressway bridge across Johor River on Senai–Desaru Expressway in Johor, Malaysia.  The 1.7 km (1.708 m) single plane cable stayed bridge connects Pulau Juling near Johor Bahru in the west to Tanjung Penyabong in the east.  Opened on June 10, 2011, it is currently has the longest central span of any river bridge in Malaysia, followed by Batang Sadong Bridge in Sarawak as the second longest.  The bridge also the longest single plane cable-stayed bridge in Malaysia.

Subaru Sambar: The Subaru Sambar is a very small vehicle manufactured by Subaru, a division of Fuji Heavy Industries, specifically for the Japanese market.  It is Japan's first "Keitora" (軽トラ), shorthand for "kei class truck" and is still in production.  The Sambar is available in both microvan and Kei truck (Pickup truck style) to fulfill the Kei car guidelines.  Still popular in the domestic market, the Sambar continues to be produced in Japan, China, Korea, as well as in Finland with a joint venture with Elcat Automotive.

Supporting paragraphs: Mercedes-Benz R107 and C107 Mercedes-Benz G-Class
Answer: Magna Steyr