With just a few upgrades for 2009, the Mercedes-Benz GL-Class gets an updated stereo head unit for all trims and keyless go standard for GL550. The GL450 is powered by 4.6L V8 making 335 hp and 339 lb-ft of torque. The GL550 features a 5.5L V8 that produces 382 hp and 391 lb-ft of torque. New is a Mercedes-Benz GL320 BlueTEC 3.0L turbocharged diesel V6 engine generating 210 hp and 398 lb-ft of torque, which as a large crossover SUV gets better mileage than its two gasoline-fueled counterparts. Fuel economy estimates for the GL550 are 13 mpg city/17 mpg hwy, and the GL450 increases the hwy rating by one mpg, while the GL320 BlueTEC achieves a very healthy 17 mpg city/23 mpg hwy. All GL-Class trims come equipped with a seven-speed automatic transmission with manual shift control. Accommodating up to seven passengers, the four-door GL-Class is equipped with 4MATIC four-wheel drive. Standard safety equipment includes stability control, antilock brakes with brake assist, front headrests, first- and second-row side airbags and full-length side curtain airbags.