More V8 power, revised interiors and exteriors, and more safety features are 2006 updates for America's best-selling SUV. Explorer has a truck-type design and offers rear-wheel drive or 4-wheel drive that can be left engaged on dry pavement and has low-range gearing. Two engines are available: a 210-hp V6 and a 292-hp V8. The V8 gains 53 hp for '06. Both use automatic transmission; the V6 retains a 5-speed, the V8 trades its 5-speed for a 6-speed. The model line ascends through XLS, XLT, Eddie Bauer, and Limited trim. Offered on all but XLS is a 3rd-row seat for seven-passenger capacity; it's available for '06 with a power-folding feature. Front side airbags are newly standard. Again optional are curtain side airbags that cover the 1st and 2nd seating rows and include rollover deployment. Antilock 4-wheel disc brakes are standard, as is traction/antiskid control with rollover sensors. Also available are 2nd-row bucket seats, DVD entertainment, sunroof, rear obstacle detection, and power-adjustable pedals. A navigation system is newly optional. Ford retrims the Explorer for sale as the Mercury Mountaineer.