The Mariner is a Mercury version of the popular Ford Escape. This SUV offers a combination of nimble handling, comfortable ride, and an optional 3.0L V-6 for decent performance. The standard 2.5L I-4 is available with a 5-speed manual or 6-speed automatic. Only the 6-speed automatic is available with the V-6. The Mariner is also offered with a Hybrid powertrain. By alternately running off batteries and the gasoline engine, the Mariner Hybrid boasts a 33 mpg rating in city driving. Although the Mariner's AWD system is optimized for on-road traction, it is capable of light duty off-road excursions. Customers looking to optimize fuel economy can choose a FWD only version of any model.

The Mariner benefits from a powertrain upgrade. A new 2.5L four-cylinder with variable cam timing adds 17-bhp. The 2.5L is ULEV II certified. The same 2.5L four-cylinder also serves as the basis for hybrid models. The 3.0L V6 receives a power bump to 230-bhp. A six-speed automatic is offered for the first time. Several changes including a revised lower front fascia and new tires improve aerodynamics and reduce rolling resistance, thus improving fuel efficiency. The Mariner also switches to Ford's capless fuel-filling solution.