The 2008 BMW 5-Series gets new 6-cylinder engines and slightly freshened exterior styling. These premium midsize sedans and wagons come in rear- and all-wheel-drive versions. The lineup starts with 528i and all-wheel-drive 528xi sedans, which replace the 525i and 525xi. One step up are the 535i sedan and AWD 535xi sedans and wagons, which replace the 530i and 530xi. The 528 and 535 have a new 3.0-liter 6-cylinder engine; it makes 230 hp in 528s, 300 in the turbocharged 535s. Unchanged for '08 are the 550i sedan, which has a 360-hp V8, and the high-performance M5, which has a 500-hp V10 and sport suspension. All are available with a 6-speed manual transmission. All but the M5 also offer a conventional 6-speed automatic transmission with available steering-wheel shift paddles. When equipped with the available Sport Package, 535i and 550 models have an optional 6-speed automated manual transmission. Available on the M5 is BMW's 7-speed automated manual transmission. The automated manuals facilitate gear changes via the floorshifter or steering-wheel paddles. The transmission can also be set to shift like an automatic. Standard on all models are ABS, traction control, antiskid system, front side airbags, and curtain side airbags. Rear side airbags are optional. BMW Assist emergency and concierge service is also standard. All models have BMW's iDrive, which uses a console knob to control entertainment, navigation, communication, and climate functions. Available features include a sport suspension teamed with run-flat tires, BMW's Active Roll Stabilization designed to counteract body lean, and BMW's Active Steering that electronically varies steering ratio and assist.