2012 Mercedes-Benz GL350 Service and Repair Manual

This factory service and repair manual for the 2012 Mercedes-Benz GL350 is for the Bluetec 4Matic sport utility, a 4-door model whose only listed engine is a diesel. That engine is a turbocharged 3.0L V6 with DOHC heads. Diesel-specific service is the heart of work on a GL350 of this year, and the manual gives specifications for it.

Engines covered

• 3.0L V6 — DOHC, turbocharged, diesel

Body styles covered

• 4-door sport utility

Trims covered

• Bluetec 4Matic

Known issues on the 2012 GL350. Three recalls were issued for this model year. The most serious instruction came with two brake booster campaigns: in certain 2012 GL350 vehicles, moisture could build up and corrode the booster housing, reducing or eliminating braking, and owners were told not to drive the vehicle until a dealer completed the repair. A separate recall for certain vehicles replaced the driver's frontal air bag module, whose inflator could burst. Of 16 owner complaints, 9 involve air bags and 4 the engine, and 1 complaint reported a fire. The manual carries the relevant brake, air bag and engine procedures, torque values and wiring diagrams.