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Mercedes-Benz CLK GTR
The Mercedes-Benz CLK GTR is a GT1 sports car built and produced by Mercedes-Benz in conjunction with their then motorsport partner AMG. Intended for racing in the new FIA GT Championship series in 1997, the CLK GTR was designed primarily as a race car. As such, the production of road cars necessary in order to meet homologation standards of GT1 was a secondary consideration in the car's design, i.e. the CLK GTR was a homologation special.
After its successful campaign in the 1997 FIA GT Championship, the car was also entered in the first two rounds of the 1998 FIA GT Championship, before being replaced for the 1998 24 Hours of Le Mans. Its successor, the 1998 Mercedes-Benz CLK LM, concluded Mercedes' GT1 program. For 1999, Mercedes introduced the Mercedes-Benz CLR, a sports car built to the Le Mans Grand Touring Prototype (LMGTP) regulations. This sports car was a purpose-built racecar that did not have to abide by the homologation rules of the previous GT1 cars.
Following the 1955 Le Mans disaster, Mercedes-Benz had withdrawn its factory-backed race team from all motorsport activities. It was not until 1985 that Mercedes reintroduced itself to motorsport, entering the 1985 World Sportscar Championship. Starting off as an engine supplier to Sauber, this partnership bloomed into a full-time factory-backed effort. Despite Mercedes winning the World Sportscar Championship twice in 1989 and 1990, they eventually withdrew at the end of 1991 following disappointing results.
However, Mercedes saw success elsewhere, with a burgeoning touring car program in the Deutsche Tourenwagen Meisterschaft, where the 190 E and its Evolution I and II siblings were climbing up the ranks. The 1991 season would see the 190 E Evo II take the honours in the constructors' championship. Klaus Ludwig piloted the car to the 1992 drivers' championship, with the 190 E being replaced by the W202 C-Class following the conclusion of the 1993 season. The C-Class went on to dominate both drivers and constructors championships from 1994 to 1996; as a result of the domination the Deutsche Tourenwagen Meisterschaft/International Touring Car Championship folded in late 1996, with both remaining competitors Opel and Alfa Romeo withdrawing due to the rising costs.
Without a top series to compete in, Mercedes-Benz looked towards the BPR Global GT Series, which had recently become an FIA-sanctioned championship, the FIA GT Championship, where Mercedes-Benz saw an opportunity to go against manufacturers such as Porsche and McLaren. The McLaren F1 GTR was the dominant car in this series, and in order to defeat it fellow German marque Porsche built a dedicated racecar, the 911 GT1. It became the first of the manufacturer's "homologation specials", with Norbert Singer modifying a Porsche 962 chassis to accommodate the front fascia of a Porsche 993, leaving other things such as the suspension and engine largely intact. Only two units of the 993-based 911 GT1 were actually completed by the end of 1996. Seeing this, AMG was tasked by Mercedes-Benz with creating a car akin to the 911 GT1, an almost purebred racing machine with a resemblance to a road car. The CLK GTR was the result, sharing nothing mechanically except the headlights, rear taillights and grille with the road-going Mercedes-Benz CLK.
The CLK GTR was developed in a mere 128 days, this development time hastened by the purchase of McLaren F1 GTR chassis #11R from then-reigning FIA GT Championship champions Larbre Compétition. The car served as AMG's mule, the F1's bodywork was replaced by AMG's own, and the BMW S70 engine replaced by Mercedes' own powerplant, a M120 V12. The car was eventually restored to its original mechanical condition, and was auctioned off in Monaco in 2000 by RM Sotheby's.
The chassis of the CLK GTR was a carbon-fibre monocoque mated to an aluminium honeycomb frame, constructed by Lola Composites, a division of Lola Cars. The engine was a derivative of the M120 engine found in the R129 SL-Class and W140 S-Class, retitled the LS600, or GT 112. The bore and stroke were kept the same at 89 mm (3.5 in) and 80.2 mm (3.2 in), however, the connecting rods were manufactured from titanium, and the compression ratio was increased from 10.0:1 to 12.0:1. These modifications boosted power to 600 PS (592 hp; 441 kW) at 7,000 rpm, and torque to 700 N⋅m (516 lb⋅ft) at 3,900 rpm, allowing the car to reach a top speed of 330 km/h (205 mph). The engine (which also served as a stressed member) was mounted amidships behind the driver, with power being sent to the rear wheels via a 6-speed sequential manual transmission, giving the car a 0–100 km/h (0–62 mph) time of 3.8 seconds. Several driving aids such as traction control, ABS, active suspension, drive by wire throttle control, were banned, with fore-aft brake bias the only aid allowed. The front and rear suspension were identical, consisting of double wishbones, with pull-rod actuated coil springs with adjustable shocks.
The CLK GTR debuted at Mercedes' home track, the Hockenheimring, at the 1997 FIA GT Hockenheim 4 Hours. Bernd Schneider qualified on pole and took the fastest lap, but had to retire due to braking problems. The sister No. 10 CLK GTR only mustered a 27th-place finish, also battling mechanical woes. Still, the pace of the car was promising, and after intense development over the summer break, Mercedes would score their first 1–2 finish at the 1997 FIA GT Nürburgring 4 Hours with Schneider and Klaus Ludwig taking the win.
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Mercedes-Benz CLK GTR
The Mercedes-Benz CLK GTR is a GT1 sports car built and produced by Mercedes-Benz in conjunction with their then motorsport partner AMG. Intended for racing in the new FIA GT Championship series in 1997, the CLK GTR was designed primarily as a race car. As such, the production of road cars necessary in order to meet homologation standards of GT1 was a secondary consideration in the car's design, i.e. the CLK GTR was a homologation special.
After its successful campaign in the 1997 FIA GT Championship, the car was also entered in the first two rounds of the 1998 FIA GT Championship, before being replaced for the 1998 24 Hours of Le Mans. Its successor, the 1998 Mercedes-Benz CLK LM, concluded Mercedes' GT1 program. For 1999, Mercedes introduced the Mercedes-Benz CLR, a sports car built to the Le Mans Grand Touring Prototype (LMGTP) regulations. This sports car was a purpose-built racecar that did not have to abide by the homologation rules of the previous GT1 cars.
Following the 1955 Le Mans disaster, Mercedes-Benz had withdrawn its factory-backed race team from all motorsport activities. It was not until 1985 that Mercedes reintroduced itself to motorsport, entering the 1985 World Sportscar Championship. Starting off as an engine supplier to Sauber, this partnership bloomed into a full-time factory-backed effort. Despite Mercedes winning the World Sportscar Championship twice in 1989 and 1990, they eventually withdrew at the end of 1991 following disappointing results.
However, Mercedes saw success elsewhere, with a burgeoning touring car program in the Deutsche Tourenwagen Meisterschaft, where the 190 E and its Evolution I and II siblings were climbing up the ranks. The 1991 season would see the 190 E Evo II take the honours in the constructors' championship. Klaus Ludwig piloted the car to the 1992 drivers' championship, with the 190 E being replaced by the W202 C-Class following the conclusion of the 1993 season. The C-Class went on to dominate both drivers and constructors championships from 1994 to 1996; as a result of the domination the Deutsche Tourenwagen Meisterschaft/International Touring Car Championship folded in late 1996, with both remaining competitors Opel and Alfa Romeo withdrawing due to the rising costs.
Without a top series to compete in, Mercedes-Benz looked towards the BPR Global GT Series, which had recently become an FIA-sanctioned championship, the FIA GT Championship, where Mercedes-Benz saw an opportunity to go against manufacturers such as Porsche and McLaren. The McLaren F1 GTR was the dominant car in this series, and in order to defeat it fellow German marque Porsche built a dedicated racecar, the 911 GT1. It became the first of the manufacturer's "homologation specials", with Norbert Singer modifying a Porsche 962 chassis to accommodate the front fascia of a Porsche 993, leaving other things such as the suspension and engine largely intact. Only two units of the 993-based 911 GT1 were actually completed by the end of 1996. Seeing this, AMG was tasked by Mercedes-Benz with creating a car akin to the 911 GT1, an almost purebred racing machine with a resemblance to a road car. The CLK GTR was the result, sharing nothing mechanically except the headlights, rear taillights and grille with the road-going Mercedes-Benz CLK.
The CLK GTR was developed in a mere 128 days, this development time hastened by the purchase of McLaren F1 GTR chassis #11R from then-reigning FIA GT Championship champions Larbre Compétition. The car served as AMG's mule, the F1's bodywork was replaced by AMG's own, and the BMW S70 engine replaced by Mercedes' own powerplant, a M120 V12. The car was eventually restored to its original mechanical condition, and was auctioned off in Monaco in 2000 by RM Sotheby's.
The chassis of the CLK GTR was a carbon-fibre monocoque mated to an aluminium honeycomb frame, constructed by Lola Composites, a division of Lola Cars. The engine was a derivative of the M120 engine found in the R129 SL-Class and W140 S-Class, retitled the LS600, or GT 112. The bore and stroke were kept the same at 89 mm (3.5 in) and 80.2 mm (3.2 in), however, the connecting rods were manufactured from titanium, and the compression ratio was increased from 10.0:1 to 12.0:1. These modifications boosted power to 600 PS (592 hp; 441 kW) at 7,000 rpm, and torque to 700 N⋅m (516 lb⋅ft) at 3,900 rpm, allowing the car to reach a top speed of 330 km/h (205 mph). The engine (which also served as a stressed member) was mounted amidships behind the driver, with power being sent to the rear wheels via a 6-speed sequential manual transmission, giving the car a 0–100 km/h (0–62 mph) time of 3.8 seconds. Several driving aids such as traction control, ABS, active suspension, drive by wire throttle control, were banned, with fore-aft brake bias the only aid allowed. The front and rear suspension were identical, consisting of double wishbones, with pull-rod actuated coil springs with adjustable shocks.
The CLK GTR debuted at Mercedes' home track, the Hockenheimring, at the 1997 FIA GT Hockenheim 4 Hours. Bernd Schneider qualified on pole and took the fastest lap, but had to retire due to braking problems. The sister No. 10 CLK GTR only mustered a 27th-place finish, also battling mechanical woes. Still, the pace of the car was promising, and after intense development over the summer break, Mercedes would score their first 1–2 finish at the 1997 FIA GT Nürburgring 4 Hours with Schneider and Klaus Ludwig taking the win.