The base 530i and the 530e come pretty nicely equipped from the start with LED adaptive headlights, 18-inch wheels, and driver-selectable vehicle settings to alter steering, transmission response and throttle calibration. They also include power-folding and heated mirrors (the driver's side has auto dimming), automatic wipers, a sunroof, dual-zone automatic climate control, a power-adjustable steering wheel, power-adjustable front sport seats, driver-seat memory functions, a 40/20/40-split folding rear seat and simulated leather upholstery.

Standard technology features include the iDrive interface, with a knob and button-based touchpad controller and a 10.2-inch touchscreen display. Also standard: a navigation system, natural-language voice controls, Bluetooth, BMW emergency services, two USB ports, and a 12-speaker sound system with a CD player.

The 540i and the diesel-powered 540d are equipped very similarly to the previous two trims but have standard leather upholstery.

It's a bigger price jump to the new performance-focused M550i xDrive, which includes everything above plus 19-inch wheels with performance tires, an adaptive suspension with electronically controlled dampers, upgraded brakes, full LED adaptive headlights with automatic high beams, aerodynamic bodywork, a rear spoiler, upgraded power front seats, an M Sport steering wheel, keyless entry and a power trunklid.

With the exception of the M550i xDrive, after you decided what powertrain you want, you can select from one of three 5 Series styling packages. The Sport is the default choice and comes with gloss-black design elements on the bumpers. The Luxury style features chrome accents from the front grille to the rear tailpipes, with light alloy wheels and modified bumper inserts to match. The M Sport steps up the sportiness with an aerodynamic style treatment, a lower M Sport suspension, and Shadowline exterior trim.

From this point, BMW offers a variety of packages, or "tiers'' in BMW lingo. The Premium package adds a power trunk, keyless ignition and entry, satellite radio, gesture control and heated front seats. Go with the Executive package to get full LED adaptive headlights with automatic high beams, soft-close automatic doors, parking sensors, an automatic parking system, a dynamic digital instrument cluster, and a surround-view camera system with 3-D mode.

Naturally, more customization is available. The Dynamic Handling package includes an adaptive suspension and active roll stabilization. For the M550i, which comes with the adaptive suspension, you also get Integral Active Steering, which is a rear-steer system. A Luxury Seating package bundles ventilated multicontour front seats with massage function and upgraded leather upholstery.

The Driving Assistance package has two levels, the first of which includes a head-up display, blind-spot monitoring and lane departure warning. Upgrading to the Driving Assistance Plus version also gets you forward collision warning with object and pedestrian protection, adaptive cruise control and lane keeping assist.

Many of these features can be equipped as stand-alone options alongside Apple CarPlay, remote control parking, night vision with pedestrian detection, a heated steering wheel, a rear-seat entertainment system, Harman Kardon or Bowers & Wilkins premium audio systems, wireless smartphone charging and ceramic-trimmed controls.