Edmunds' expert review of the Used 2007 Mercury Mountaineer provides the latest look at trim-level features and specs, performance, safety, and comfort. ... The standard engine is a 4.0-liter V6 ... Research 2007 Mercury Mountaineer specs for the trims available. Choose the desired trim / style from the dropdown list to Electrical. Cold Cranking Amps @ 0° F (Primary). 650. Maximum Alternator Capacity (amps). Mercury Mountaineer. Body Style. 4 Door. Vehicle Name. Mercury Mountaineer.