Horsepower numbers climb in the 2005 model year for luxury car builder Mercedes-Benz. The German automaker and British Formula 1 team McLaren combine their talents to produce a fiercely-fast supercar. The 2005 Mercedes-Benz SLR McLaren is an ultra-exotic two-passenger machine powered by a 617-horsepower V-8 engine. Mercedes-Benz high-performance fans are also catered to with a more robust SL65 AMG model debuting in 2005 with a 604-horsepower, twin-turbocharged V-12 powerplant. Mercedes-Benz has also greatly hiked performance from their rugged-looking G-Class by creating a 469-horsepower G55 AMG model for 2005. For Mercedes-Benz sports car hunters seeking a more accessible model, the SLK is presented as an attractive choice with an all-new design. The re-engineered 2005 Mercedes-Benz SLK is larger than its predecessor and is equipped with all-new powerplants. The Mercedes-Benz E-Class expands again with the addition of a turbocharged diesel-powered E320CDI model for 2005. On the 2005 S-Class models, buyers can opt for all-wheel drive at no extra cost on the S430 and S500. The 2005 Mercedes-Benz M-Class is offered with a Special Edition equipment option featuring a combination of styling touches.