This manual covers the Mercury Montego for the 2005, 2006, and 2007 model years. Built on the Ford CD3 Platform, the Montego was offered as a 4-door sedan and a 5-door wagon, sharing engineering with models derived from the Volvo S80 chassis. It was equipped with either a 3.0L Duratec V6 engine or an optional 3.5L Duratec V6, paired with a 6-speed automatic transaxle, though a 5-speed manual was also available. The Montego emphasized upscale styling and comfort within Mercury's brand heritage, achieving consistent 5-star NHTSA safety ratings for frontal and side impacts, and came standard with features like Anti-lock Braking System and Traction Control. This comprehensive workshop service repair manual provides detailed information for the maintenance, repair, and diagnostics of your Mercury Montego. It covers all major systems, including engine mechanical and electrical components, fuel, emission control, drivetrain, suspension, steering, brakes, body, interior, exterior, and HVAC systems. The manual includes step-by-step instructions, diagrams, illustrations, and wiring schematics, offering dealer-level service procedures for a complete overhaul. It is designed to assist DIY enthusiasts, independent repair shops, and dealership technicians in performing accurate and efficient repairs, ensuring the longevity and optimal performance of the vehicle.