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Mercedes-Benz M-Class

EPA MPG: 19 mpg

RECALL ALERT:
There are 3 recalls on this vehicle. Learn More.

Reliability

Overall Reliability

The 2014 M-Class has about average reliability compared to other cars from the same model year.

The 2014 Mercedes-Benz M-Class has been recalled 3 times by NHTSA. View Recalls
Most Common Trouble Spots
Common Trouble Spot
Common Trouble Spot

Owner Reported Trouble Spots

The Reliability score is based on our latest subscriber survey of 2014 Mercedes-Benz M-Class owners. The owner comments describe problems respondents experienced with this vehicle.

Engine Minor

Accessory belts and pulleys, engine computer, engine mounts, engine knock or ping, fuel leaks, oil leaks.

What Owners Say

Accessory belts or pulleys

"A pulley seized and shredded the accessory belt."

Anonymous, WI (2014 Mercedes-Benz M-Class ML350 BlueTec 3.0-L V6 diesel)
Oil leaks

"Oil cooler cracked and failed"

Anonymous, CA (2014 Mercedes-Benz M-Class ML350 BlueTec 3.0-L V6 diesel)

"Constantly replacing seals to stop engine leaks"

Anonymous, WI (2014 Mercedes-Benz M-Class ML350 BlueTec 3.0-L V6 diesel)

""Slow oil leak after 100,000 miles. A gasket needed to be replaced, but taking apart the engine to get to it revealed nearly blocked manifold exhaust. This is a diesel engine. It's turbocharged. It's a six cylinder. And these are no longer installed on the MERCEDES-BENZ SUVs.""

Anonymous, OH (2014 Mercedes-Benz M-Class ML350 BlueTec 3.0-L V6 diesel)

Exhaust

Muffler, pipes, catalytic converter, exhaust manifold, heat shields, leaks.

What Owners Say

Other/unsure

""engine mounts leaking, headgasket leak, rear crankshaft seal leaking""

Anonymous, CA (2014 Mercedes-Benz M-Class ML350 3.5-L V6)

Engine Electrical

Alternator, starter, hybrid battery replacement, hybrid battery related systems, regular battery, battery cables, engine harness, coil, ignition switch, electronic ignition, spark plugs and wires failure, auto stop/start.

What Owners Say

Spark plugs or wires failure

"Ignition coil replacement"

Anonymous, MN (2014 Mercedes-Benz M-Class ML350 3.5-L V6)

Engine Major

Engine rebuild or replacement, cylinder head, head gasket, turbocharger or supercharger, timing chain or belt.

What Owners Say

Other major engine problem

"Manifold exhaust on engine ducts were nearly totally blocked. This is a diesel engine."

Anonymous, OH (2014 Mercedes-Benz M-Class ML350 BlueTec 3.0-L V6 diesel)

Drive System

Driveshaft or axle, CV joint, differential, transfer case, four-wheel-drive/all-wheel-drive components, driveline vibration, electrical failure, traction control, electronic stability control.

Electrical Accessories

Cruise control, clock, warning lights, body control module, keyless entry, wiper motor or washer, tire pressure monitor, interior or exterior lights, horn, gauges, 12V power plug, USB ports, alarm or security system, remote engine start, heated or cooled seats, heated steering wheel, headlights, automatic headlights, automatic wipers, wireless charging pad.

Engine Cooling

Radiator, cooling fan, water pump, thermostat, antifreeze leaks, overheating.

Suspension/Steering

Shocks or struts, ball joints, tie rods, wheel bearings, alignment, steering linkage (includes rack and pinion), power steering (pumps and hoses, leaks), wheel balance, springs or torsion bars, bushings, electronic or air suspension.

Brakes

Premature pad/rotor wear, pulsation or vibration, antilock system, parking brake, master cylinder, calipers, squeaking, brake failure, regenerative braking.

In-car Electronics

Infotainment system (audio, GPS, phone), rear entertainment system, backup or other camera/sensors, head-up display.

Transmission Major

Transmission rebuild or replacement, torque converter, premature clutch replacement.

Body Hardware

Windows, locks and latches, doors or sliding doors, tailgate, trunk or hatch, mirrors, seat controls (power or manual), seat belts, sunroof, convertible top, glass defect.

Climate System

AC compressor, blower (fan) motor, condenser, evaporator, heater system, automatic climate system, electrical failure, refrigerant leakage.

Transmission Minor

Gear selector and linkage, transmission computer, transmission sensor or solenoid, clutch adjustment, rough shifting, slipping transmission, leaks.

Noises/Leaks

Squeaks, rattles, wind noises, seals and/or weather stripping, air and water leaks.

Paint/Trim

Paint (fading, chalking, peeling, or cracking), loose interior or exterior trim or moldings, rust.

Fuel System/Emissions

Sensors (O₂, or oxygen, sensor), emission-control devices (includes EGR), fuel-injection system, fuel gauge/sender, fuel pump, problems filling up the tank.

2014 SUVs Reliability

This Car
vs. Similar Cars

Mercedes-Benz vs. Other New Car Brands Reliability

Reliability History
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Overall Reliability Verdict
POTENTIAL TROUBLE SPOTS
Powertrain
Engine Major
Engine Minor
Engine Cooling
Engine Electrical
Transmission Major
Transmission Minor
Drive System
Fuel System/Emissions
Exhaust
Suspension/Steering
Brakes
Climate System
Build Quality
Electrical Accessories
Body Hardware
Paint/Trim
Noises/Leaks
In-car Electronics
Reliability indicates how models have performed in the past, providing the basis for predicting how the vehicles will hold up in the year ahead. These charts provide the most comprehensive reliability information available to consumers. Based on information received from our latest subscriber survey for about 380,000 vehicles, our reliability history charts give you a rundown on how 2000 through 2025 vehicles are holding up in 20 potential trouble spots, ranging from the engine, transmission, electric motor, EV charging, and brakes, to power equipment and the electrical accessories.
Recalls
PROVIDED BY
FUEL SYSTEM, DIESEL, FUEL SYSTEM, GASOLINE
Dec 23, 2022
An engine stall while driving increases the risk of a crash.
Summary:
Mercedes-Benz USA, LLC. (MBUSA) is recalling certain 2012-2014 ML550, 2012-2015 ML350, AMG ML63, 2015 ML250, ML400, 2016 GLE450, GLE300, 2016-2018 GLE350, GLE550, 2016-2019 GLE400, 2017-2019 AMG GLE43, and 2016-2020 AMG GLE63 vehicles. Water might accumulate in the spare tire wheel well and damage the fuel pump control unit, which could cause an engine stall while driving.
What should you do:
Dealers will install a water drain plug, inspect for water intrusion, and replace the fuel pump control unit as necessary, free of charge. Owner notification letters were mailed February 15, 2023. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's numbers for this recall are 2023010002 and 2023010003.
For more information:
Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.nhtsa.gov.
NHTSA CAMPAIGN ID Number: 22V955000
Potential Number of Units Affected: 348183
COMMUNICATION
Nov 01, 2019
An inaccurate vehicle location may delay emergency responders, increasing the risk of injury.
Summary:
Mercedes-Benz USA, LLC. (MBUSA) is recalling certain 2013-2017 vehicles due to a software fault that may cause the date and time for the emergency call system (eCall) to differ from the actual date and time, potentially relaying an inaccurate vehicle location. For a full list of the affected models visit: https://static.nhtsa.gov/odi/rcl/2019/RMISC-19V787-4620.pdf
What should you do:
MBUSA has initiated an Over the Air (OTA) remote update. MBUSA will also notify owners, and dealers will check software for a successful OTA or update the communication module software as needed, free of charge. The recall began December 23, 2019. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2019120008.
For more information:
Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov.
NHTSA CAMPAIGN ID Number: 19V787000
Potential Number of Units Affected: 24226
SUSPENSION
Apr 27, 2018
The leaking oil in the presence of an ignition source can increase the risk of a fire.
Summary:
Mercedes-Benz USA, LLC. (MBUSA) is recalling certain 2012-2014 ML350 Bluetec 4Matic and ML550 4Matic, 2012-2015 ML63 AMG 4Matic and ML350 4Matic, 2013-2016 GL350 Bluetec 4Matic, GL550 4Matic and GL63 AMG 4Matic, 2017 GLS350d 4Matic, GLS450 4Matic, GLS550 4Matic and GLS63 AMG 4Matic, 2015 ML400 4Matic, 2016 GLE400 4Matic, GLE350 4Matic, GLE63 AMG 4Matic, GLE63S AMG 4Matic, GLE450 4Matic Coupe and GLE63S AMG 4Matic Coupe, 2015-2016 GL450 4Matic and 2013-2014 GL450 4Matic vehicles equipped with the Active Curve System (ACS). In certain driving conditions, if the oil level in the ACS reservoir is below the minimum level, the oil may foam and leak out of the vent holes in the reservoir cap.
What should you do:
MBUSA will notify owners, and dealers will correct the oil level as necessary and replace the reservoir sealing cap to prevent oil foam from leaking out, free of charge. The recall began August 30, 2018. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's number for this recall is 2018070015.
For more information:
Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov.
NHTSA CAMPAIGN ID Number: 18V272000
Potential Number of Units Affected: 9725
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