2012 Mercedes-Benz GL450 Service and Repair Manual

This factory service and repair manual for the 2012 Mercedes-Benz GL450 covers a 4.7L V8 of 285 cubic inches, a naturally aspirated gasoline engine with dual overhead camshafts. That V8 powers a four-door sport utility body, and Base is the single trim listed. Procedures, specifications and torque values cover the engine, drivetrain, brakes and suspension of this SUV, while wiring diagrams and diagnostics address its restraint system and body electrics.

Engines covered

• 4.7L V8 (285 cu in) — DOHC, naturally aspirated, gasoline

Body styles covered

• 4-door sport utility

Trims covered

• Base

Known issues on the 2012 GL450. Three recalls on the federal record name the 2012 GL450. Two concern certain vehicles where moisture could gather in the brake booster housing and corrode it, weakening braking or leading to brake failure; owners were told not to drive until a dealer inspected the booster and replaced it where needed. The third covers certain vehicles whose driver frontal air bag inflator could rupture and throw metal fragments, fixed with a new air bag module. Owners filed 45 complaints, led by air bags with 21, suspension with 7 and the power train with 4; two complaints reported a crash and one reported at least one injury. The manual covers brake booster procedures, air bag diagnostics and suspension torque values.