2014 Mercedes-Benz GL-Class Problems: 4 Known Issues
2014 model year · 4,200+ owner reports · Updated November 2026
According to Au7o's analysis of 4,200+ owner reports, the 2014 Mercedes-Benz GL-Class has 4 documented known issues, with 2 rated critical. The most serious are AIRMATIC Air Suspension Compressor Failure ($1,200-$3,000 repair) and OM642 Diesel Oil Cooler Seal Leak ($1,000-$2,500 repair). The most commonly reported issue is AIRMATIC Air Suspension Compressor Failure with 1,800 owner reports. Across all issues with published estimates, repair costs range from $200 to $3,500. DIY maintenance guides at au7o.io.
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All 4 Known Issues
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Frequently Asked Questions
What are the most common Mercedes-Benz GL-Class problems?
According to Au7o's analysis of 4,200+ owner reports, the 2014 Mercedes-Benz GL-Class has 4 documented issues. The most frequently reported are: AIRMATIC Air Suspension Compressor Failure, OM642 Diesel Oil Cooler Seal Leak, Transfer Case Actuator and Chain Wear (4MATIC). Of these, 2 are rated critical and should be addressed promptly.
Is the Mercedes-Benz GL-Class reliable?
The 2014 Mercedes-Benz GL-Class has 4 known issues documented across 4,200+ owner reports. 2 issues are rated critical: AIRMATIC Air Suspension Compressor Failure and OM642 Diesel Oil Cooler Seal Leak. Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.
How much does it cost to fix common Mercedes-Benz GL-Class problems?
Repair costs for known Mercedes-Benz GL-Class issues range from $200 to $3,500, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, AIRMATIC Air Suspension Compressor Failure, typically costs $1,200-$3,000 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
What is the 2007-2016 Mercedes-Benz GL-Class AIRMATIC Air Suspension Compressor Failure?
The air suspension compressor on the GL-Class is heavily stressed due to the vehicle's size and weight. The compressor fails from overwork caused by slow leaks in the air springs, leading to a complete inability to maintain ride height. The GL's weight means the compressor cycles… Repairs typically run $1,200-$3,000. Severity: high.
What is the 2007-2016 Mercedes-Benz GL-Class OM642 Diesel Oil Cooler Seal Leak?
The OM642 3.0L V6 diesel engine in the GL-Class develops oil cooler seal leaks where engine oil seeps externally. The oil cooler is sandwiched between the engine block and intake manifold, and the gaskets harden over time. Oil collects in the engine valley and runs to the rear of… Repairs typically run $1,000-$2,500. Severity: high.
What is the 2007-2016 Mercedes-Benz GL-Class Transfer Case Actuator and Chain Wear (4MATIC)?
The 4MATIC transfer case on the GL-Class develops actuator failures and internal chain wear. The electronic actuator that controls torque distribution fails, triggering drivetrain faults. Additionally, the internal chain stretches over time, producing a whining noise and eventual… Repairs typically run $600-$3,500. Severity: medium.
What is the 2007-2016 Mercedes-Benz GL-Class Power Tailgate Strut and Latch Failure?
The power tailgate on the GL-Class develops failures in the gas struts and electric latch mechanism. The gas struts lose pressure and can no longer hold the heavy tailgate open, creating a safety hazard as the gate drops unexpectedly. The electric latch mechanism also wears, prev… Repairs typically run $200-$800. Severity: low.
Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.