The least expensive 5 Series is now the 528i ($44,300), powered by BMW's high-tech magnesium alloy 3.0-liter inline 6 generating 230 horsepower, or 15 more than the previous 525i. With all 5 Series models, buyers can now choose either a six-speed manual or six-speed automatic transmission for the same price. The 528xi ($46,500) adds BMWs x-Drive automatic all-wheel drive system.

The 528s come with leatherette upholstery, dual-zone automatic climate control with active micro-filtration, an AM/FM/CD stereo with 10 speakers, 17-inch alloy wheels, four power outlets and a rechargeable flashlight in the glovebox.

The newly designated 535i ($49,400) and 535xi ($51,600) get a 300-hp, twin-turbocharged 3.0-liter six launched in 2007 3 Series cars. That's an increase of 45 horsepower over the former 530i. The 535xi Sports Wagon ($54,000) has x-Drive all-wheel drive. All 535s add xenon adaptive headlights.

The most popular option for the six-cylinder models is the Premium Package ($2,300 for 528i, $2,100 for 535i), which adds Dakota leather upholstery, a universal garage door opener and the swanky interior lighting package with ambient light, auto-dimming and outside approach lighting.

Those items come standard on the 550i ($58,500), which is powered by a 360-hp, 4.8-liter V8. The 550i also comes with Park Distance Control parking assist.

For 2008, the 535s and the 550i can be equipped with a Sport Automatic ($500) transmission, which adds paddle shift bars on the steering wheel and shifts more crisply in manual mode. BMW's Sequential Manual Gearbox, which works like a manual without a clutch pedal, is no longer offered on any 5 Series except the ultra-high performance M5.

The M5 ($82,900) sits atop the 5 Series lineup. It's powered by a hand-built 500-hp 5.0-liter V10, with suspension and brakes enhanced to match all the power, offered with either a six-speed full manual or a seven-speed SMG clutch-less manual gearbox.

Two big ticket options have been added for 2008. BMW's Lane Departure Warning system ($500) is camera based, and notifies the driver via mild steering-wheel vibration of any movement that might indicate an inadvertent lane change. The new Stop and Go feature for Active Cruise Control ($2,400) is space age. Like the previous system, it uses radar to keep the 5 Series from moving to close to a car ahead, without driver intervention. Yet the new Stop and Go system works even in heavy traffic, accommodating speeds all the way down to a complete stop, and resuming to the set speed from 0 mph.

Other option groups include: the Cold Weather Package ($750), with heated front seats, heated steering wheel and heated, high-pressure headlight washers; the Sport Package ($2,800 for six-cylinder models, $1,300 for all-wheel drive and $4,600 the 550i), with BMWs Active Steering and Active Body Control systems, larger wheels with performance tires, more potent brakes and sport seats; and Logic7 audio ($1,200) with six-CD changer.

Stand-alone options include a navigation system ($1,900), a folding rear seat ($475), Sirius satellite radio ($595), and a new auxiliary iPod/USB jack ($400). HD Radio ($500) delivers enhanced digital audio quality, with FM reception that compares to CD quality and AM reception comparable to analog FM. BMW's head-up display, or HUD ($1,200), projects speed and other data on the windshield, while Night Vision ($2,200) uses a thermal-imaging camera that monitors the road ahead and displays images on the navigation screen before they might be visible to t