The Mercury Mariner is a Ford Escape with more stylish appointments and only minor differences equipment. Mariner offers a combination of nimble handling, comfortable ride, and an optional 3.0L V-6 for decent performance. The standard 2.3L I-4 is available with a 5-speed manual or 4-speed automatic. Only the 4-speed automatic is available with the V-6. For 2006, the Mariner gains a hybrid powertrain model. By alternately running off batteries and the gasoline engine, the Mariner Hybrid boasts a 36 mpg rating in city driving.

A gasoline/electric hybrid version of the Mariner appears. It mates a 133hp 4-cylinder engine to an electric motor and CVT transmission. The Mariner hybrid can operate fully on electric power.