overheating. The valves continue to operate, in order to pump cooling air through the cylinders. The cooling system was designed to maintain an ideal engine temperature even when subjected to a prolonged 15 percent gradient in weather. A returnless fuel supply system helped to reduce evaporative emissions by providing consistent pressure to the fuel injectors through a high-pressure pump. New active hydraulic engine mounts were introduced to prevent the powertrain from inducing vibrations into the chassis. By optimizing these engine mounts, the engine block can act as a mass damper, absorbing chassis resonance, improving ride comfort. Expedition's passenger cabin was better sealed than before, in an effort to eliminate intrusive outside noise from reaching the occupants. Wind, powertrain, road and vehicle body noise was reduced by improving interior acoustics through new damping materials, a total of 10 shear-style isolating body mounts, heavier sealing of body and panels, redesigned rubber door seals, and extensive use of interior structural acoustic foam in the upper B-pillars, upper and lower D-pillars and floor pan. Road noise was reduced by 2 decibels, body air leakage reduced by 56 percent, chances for sealant noise disturbances reduced from 15 percent to less than 0.5 percent and wind noise measured at was reduced from 35 sones to a world class level of 29 sones. The Expedition also received a thorough exterior and interior cosmetic redesign. Expedition featured an all-new front fascia, grille work, headlamps, body trim, rear fascia, tail lamps and liftgate. Interior fit and finish were improved with an all-new interior featuring new dash, door panels, genuine aluminium trim, and plush carpeting. Premium perforated leather seating surfaces were standard on Expedition Eddie Bauer (optional on Expedition XLT). Expedition FX4 models featured all of Expedition's optional off-road equipment as standard equipment. Expedition's drag coefficient was 0.41 Cd. Three-row seating was standard with all-new manual fold-flat stow away third row seats. No longer did owners have to remove the third rows seats for more storage. The third row could simply "disappear" into the floor. Power assisted PowerFold fold-flat third row seating was available as an optional extra. Available features included in-dash CD-ROM based navigation system, DVD based rear entertainment system, ultrasonic rear park assist/back up sensors, power moon roof, power adjustable accelerator and brake pedals (introduced on the first generation Expedition), Gentex auto dimming electrochromatic rear view mirror, turn signals, side marker lights and reflectors, second-row captain's chair luxury