Need a plush, potent, and green-leaning ride to work or the theatre? Check out the 2015 Lexus LS 600h L. This 5-passenger full-size luxury hybrid sedan returns with the extra-long LS 460 L chassis, and totes enough bells and whistles to satisfy the most demanding corner-office-bound commuter. However, reviewers warn that this high-end hybrid lags behind its non-hybrid LS kinfolk in a number of key areas. For instance, the apt-stowed hybrid battery pack slices trunk space by a third. It’s also a bit slower off the line, and fuel savings are marginal at best. Those contemplating this flagship gas/electric sedan might want to consider all this before shelling out almost twice the MSRP of the non-hybrid LS. In any case, the 2015 LS 600h L comes in only a single Base trim. Said solitary selection packs standard full-time all-wheel drive (AWD), not to mention a 121.7-inch wheelbase (205 inches of overall length) leading to one of the roomier cabins in the high-end hybrid sedan market. For 2015 the standard GPS-based navigation system gets some new software, while the Enform infotainment functions have been updated to offer Slacker Internet radio and Enform Remote smartphone apps via an improved customizable 12.5-inch touchscreen display. Also added this year are dynamic grid lines that are integrated into the standard rear-view camera to better judge, for example, rearward parking challenges. Power-wise, look for the LS 600h L to remain packing the standard 5.0-liter hybrid V8 engine that works with a pair of electric motors to pound out 438 total hp. The standard continuously variable transmission (CVT) also returns to manage the V8’s output to the tune of an unimpressive 19 mpg city/23 highway. Boasting a 288-volt Nickel-Metal hydride battery, this latest edition of Lexus’ high-end 4-door hybrid again features regenerative braking to help juice up the battery pack. One electric motor stands as the primary generator and engine starter, and the other functions as the drive motor. Though it boasts a bit more punch than its regularly powered compatriot, the hybrid LS is clocked a bit slower in 0-60 time (about 0.3 seconds fewer) due to the added weight of the gas/electric paraphernalia. As for appearance features, look for the 2015 LS 600h L to tote 19-inch alloy wheels, an adjustable air suspension system, variable-ratio steering, LED headlights, heated auto-dimming power-adjustable mirrors, and a power sunroof. Inside, expect standard leather upholstery, genuine wood cabin trim pieces, heated power-adjustable front and rear seats, full power accessories, a heated steering wheel, and a cooled rear storage console, as well as cruise control and power-adjustable telescoping tilt-wheel steering. Of course, front and rear parking sensors, an auto-dimming rear-view mirror, and the newly grid-lined rear-view camera system also come standard, as do 4-zone auto climate control and a power-operated trunk lid. Delivered techno-gizmos include Bluetooth-interfaced Enform infotainment features, such as the new smartphone apps and internet radio services, integrated into aforementioned upgraded 12.3-inch display. Furthermore, Siri Eyes Free voice-control remains standard, as does a 19-speaker Mark Levinson Surround Sound premium audio system that boasts a 6-CD changer, satellite radio, auxiliary audio input, and rear-seat controls. Should the above prove inadequate for your commuting comfort expectations, an Executive Class package adds additional leather cabin accents, infrared cabin temperature sensors, rear-seat Blu-ray video entertainment, and massaging rear seats with an optional rear-seat passenger-side ottoman sporting knee airbag protection. Standard safety equipment aboard the 2015 LS 600h L includes 4-wheel antilock brakes, front and rear head airbags, front side-mounted airbags, LED running lights and front fog/driving lights, turn-signal-integrated mirrors, Enform emergency telematics (Safety Connect), a post-collision safety system, and a remote antitheft alarm. Additionally, blind-spot monitoring also comes standard in this plush hybrid. Optional safety stuff, finally, includes a pair of adaptive cruise control setups: one with simple pre-collision warnings and braking, and the other with pre-collision braking plus advanced collision warning, a driver attention monitor, and lane-departure alerts and intervention.