The 2018 BMW 5 Series is a five-passenger sedan available in five trim levels, all with different powertrains. 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.