BMW has revealed a comprehensive mid-life cycle refresh for the 2013 7-Series sporting new front and rear ends, upgraded interior, new equipment and new engines.

Starting with the exterior, the flagship sedan features full-LED headlights with hallmark BMW corona rings, kidney grille with nine slats (instead of 12), new front bumper fascia design, new side mirror indicators and a redesign rear bumper fascia with chrome strips and reflectors.

Inside, the upgraded interior receives newly designed leather seats, additional soundproofing and an optional Rear Seat Entertainment package which delivers 1,200-watts through a Bang & Olufsen Surround Sound System via 16 speakers. The Entertainment package also features a new 9.2-inch flatscreen monitor and an illuminated center speaker which retracts into the instrument panel. Up front, the central control display uses a 10.25-inch screen and features new black-panel technology with high-resolution 3D graphics.

New to the 7-Series engine line-up is the new TwinPower Turbo six-cylinder diesel engine which can be found in the BMW 750d xDrive. Billed as the world's most powerful six-cylinder in-line diesel engine, the 3.0-liter features three turbochargers and produces a maximum output of 381 HP (280 kW / 375 bhp) and 740 Nm (546 lb-ft) of torque. The 750d xDrive sprints from 0 to 100 km/h (62 mph) in only 4.9 seconds while posting a fuel economy rating of 6.4L/100km (44.1 mpg) in the EU test cycle. CO2 emissions are 169 g/km.

Also new is the BMW ActiveHybrid 7 in its second generation hybrid drive system which now uses the TwinPower Turbo 3.0-liter in-line six-cylinder which produces 320 HP (235 kW / 315 bhp), instead of the 4.4-liter twin-turbo V8 engine used in the first version. Other hybrid components include the 55 HP (40 kW / 54 bhp) synchronous electric motor, the hybrid-spec eight-speed automatic transmission, a lithium-ion high-performance battery and power electronics underpinning Brake Energy Regeneration and Hybrid Start Stop function. With a combined power output of 354 HP (260 kW / 349 bhp) and peak torque of 500 Nm (369 lb-ft), the new BMW ActiveHybrid 7 accelerates from 0 to 100 km/h (62 mph) in just 5.7 seconds while achieving an average fuel economy of 6.8L/100km (41.5 mpg) and CO2 emissions of 158 g/km. The ActiveHybrid 7 can travel up to four kilometers (just under 2.5 miles) on battery power alone. Top speed in this mode is limited to 60 km/h (37 mph).

Gallery: 2013 BMW 7-Series facelift revealed [video]

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