According to Au7o's analysis of 2,880+ owner reports, the 2014 Mercedes-Benz M-Class has 2 documented known issues, with 1 rated critical. The most serious is AIRMATIC Air Suspension Strut and Compressor Failure ($1,000-$3,500 repair). The most commonly reported issue is AIRMATIC Air Suspension Strut and Compressor Failure with 2,100 owner reports. Across all issues, repair costs range from $500 to $3,500. DIY maintenance guides at au7o.io.
On the 2006-2015 Mercedes-Benz M-Class, the AIRMATIC air suspension on the M-Class is prone to air spring leaks and compressor failures, identical to issues on other Mercedes SUVs. The rubber air spring bladders crack from age and road debris, causing the vehicle to sag and the compressor to overwork. The M-Class weight accelerates wear on all suspension components.
Replace leaking air springs and the compressor if it has failed. Consider replacing all four air springs simultaneously. Arnott and Bilstein offer quality aftermarket alternatives. Some owners convert to conventional coil springs using conversion kits to eliminate the air suspension entirely.
What Owners Are Using
Parts and tips from 2,100+ owners who fixed this issue
TipArnott coil spring conversion kits eliminate the air suspension entirely for about $800 total. Many high-mileage ML owners do this to avoid repeated air suspension repairs.
High Confidence2,100 reportsLast reported by owners Jan 2026Reviewed Mar 2026
Community Reported
780 owners
On the 2006-2015 Mercedes-Benz M-Class, the 4MATIC transfer case chain in the M-Class stretches over time, producing a noticeable whining noise that increases with speed. The chain drives the torque split between front and rear axles, and excessive stretch causes imprecise torque distribution and eventually transfer case failure. Regular fluid changes help prevent premature chain wear.
If caught early, a transfer case fluid change can slow progression. Advanced chain wear requires transfer case removal and rebuild or replacement. The chain, sprockets, and bearings should all be replaced during a rebuild. Use only Mercedes-approved transfer case fluid.
What Owners Are Using
Parts and tips from 780+ owners who fixed this issue
TipChange the transfer case fluid every 40,000 miles. Mercedes does not include this in the standard service schedule, but it is critical for these heavy AWD SUVs.
What are the most common Mercedes-Benz M-Class problems?
According to Au7o's analysis of 2,880+ owner reports, the 2014-2014 Mercedes-Benz M-Class has 2 documented issues. The most frequently reported are: AIRMATIC Air Suspension Strut and Compressor Failure, Transfer Case Chain Wear and Whining Noise. Of these, 1 is rated critical and should be addressed promptly.
Is the Mercedes-Benz M-Class reliable?
The 2014-2014 Mercedes-Benz M-Class has 2 known issues documented across 2,880+ owner reports. 1 issue is rated critical: AIRMATIC Air Suspension Strut and Compressor Failure. 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 M-Class problems?
Repair costs for known Mercedes-Benz M-Class issues range from $500 to $3,500, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, AIRMATIC Air Suspension Strut and Compressor Failure, typically costs $1,000-$3,500 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
What is the 2006-2015 Mercedes-Benz M-Class AIRMATIC Air Suspension Strut and Compressor Failure?
The AIRMATIC air suspension on the M-Class is prone to air spring leaks and compressor failures, identical to issues on other Mercedes SUVs. The rubber air spring bladders crack from age and road debris, causing the vehicle to sag and the compressor to overwork. The M-Class weigh… Repairs typically run $1,000-$3,500. Severity: high.
What is the 2006-2015 Mercedes-Benz M-Class Transfer Case Chain Wear and Whining Noise?
The 4MATIC transfer case chain in the M-Class stretches over time, producing a noticeable whining noise that increases with speed. The chain drives the torque split between front and rear axles, and excessive stretch causes imprecise torque distribution and eventually transfer ca… Repairs typically run $500-$3,000. Severity: medium.
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.
