Showing the 2015 ML-Class ML350 Bluetec. NHTSA's VIN data shows it with a 3.0 L engine, but that may not be every version of it, so the numbers below cover every version of this model year. Every version
Owner complaints, recalls, fuel economy and safety ratings from public NHTSA and EPA data, updated Oct 18, 2026.
Fuel economy
15–25 mpgcombined; city 13–22, highway 17–29; every version of this model year
Five years of fuel
$18,540–$26,830U.S. average; Ohio $18,780–$25,280 at local prices; every version of this model year; fuel only, not other costs of owning it; 15,000 miles a year, at EIA fuel prices for the week of Oct 12, 2026
NHTSA's VIN data lists these trims for the 2015 ML-Class. A trim's engine and numbers are shown as its own only where EPA names versions after the trim and no other version could be it; "seen with" means a source shows that engine on the trim, not that it was the only one. Recalls and complaints cover the whole model year: whether a recall applies to a car depends on its VIN, on NHTSA's recall lookup.
Owners have filed 66 complaints with NHTSA about the 2015 ML-Class. These are unverified owner reports, counted by the part of the car they name; one complaint can name several parts. Counts aren't adjusted for how many were sold, so they don't show how reliable a car is.
Complaints by part of the car
Part
Complaints
Crashes
Fires
Injuries
Engine
16
0
0
1
Unknown or other
13
2
0
1
Power train
8
4
0
1
Service brakes
7
2
0
1
Steering
6
4
0
1
Electrical system
5
0
0
0
Fuel system, diesel
5
0
0
0
Fuel system, gasoline
5
0
0
0
Fuel/propulsion system
5
0
0
0
Structure
5
3
0
0
Air bags
4
3
0
3
Suspension
4
0
0
1
11 more parts
Vehicle speed control
3
2
0
0
Visibility
3
0
0
0
Seat belts
2
0
0
1
Engine and engine cooling
1
0
0
0
Equipment adaptive/mobility
1
0
0
0
Exterior lighting
1
0
0
0
Forward collision avoidance
1
0
0
0
Lane departure
1
0
0
0
Latches/locks/linkages
1
0
0
0
Tires
1
0
0
0
Wheels
1
0
0
0
What the columns count
Complaints: complaints that name that part. One complaint can name several parts, so the rows overlap and don't add up to the total.
Crashes and Fires: complaints that report one. Two owners can file about the same event, and NHTSA doesn't link them, so these count reports, not events.
Injuries: the number of people the complaints say were injured.
None of these columns shows that a part caused a crash, fire or injury: they're what owners reported, unverified.
Complaints by model year
Newer years have had less time to collect complaints, and counts aren't adjusted for sales, so a shorter bar doesn't mean a more reliable year.
NHTSA lists 7 recall campaigns for the 2015 ML-Class over its history. Campaigns are matched by model and year, so each one may apply to a given car, and its repair may already be done: check a VIN on NHTSA's recall lookup for the open recalls on that exact car.
NHTSA campaign 22V955000 · reported Dec 23, 2022 · 348,183 vehicles potentially affected across the whole campaign
Remedy: 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.
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.
Risk: An engine stall while driving increases the risk of a crash.
NHTSA campaign 19V787000 · reported Nov 1, 2019 · 24,226 vehicles potentially affected across the whole campaign
Remedy: 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.
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
Risk: An inaccurate vehicle location may delay emergency responders, increasing the risk of injury.
NHTSA campaign 18V272000 · reported Apr 27, 2018 · 9,725 vehicles potentially affected across the whole campaign
Remedy: 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.
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.
Risk: The leaking oil in the presence of an ignition source can increase the risk of a fire.
NHTSA campaign 16V900000 · reported Dec 14, 2016 · 48 vehicles potentially affected across the whole campaign
Remedy: MBUSA will notify owners, and dealers will replace the axle carrier bolts, free of charge. The recall is began February 2017. Owners may contact MBUSA customer service at 1-800-367-6372.
Mercedes-Benz USA, LLC. (MBUSA) is recalling certain model year 2015 GL350 4Matic Blutec, GL450 4Matic, GL550 4Matic, ML250 Blutec, ML350, ML350 4Matic, ML400 4Matic and 2015-2016 GL63 AMG 4Matic vehicles manufactured September 29, 2014 through March 27, 2015. The affected vehicles have axle bolts on the front and/or rear drive axle carriers that may not have been assembled correctly. As a result, the remaining bolts may fracture.
Risk: If any of the remaining front or rear axle bolts fracture, the vehicle may be unstable, reducing the handling capability and increasing the risk of a crash.
NHTSA campaign 16V442000 · reported Jun 16, 2016 · 423 vehicles potentially affected across the whole campaign
Remedy: MBUSA will notify owners, and dealers will inspect and, if necessary, correct the installation of the right rear seat belt anchor bolt, free of charge. The recall began on July 22, 2016. Owners may contact MBUSA customer service at 1-800-367-6372.
Mercedes-Benz USA, LLC (MBUSA) is recalling certain model year 2015 ML250, ML350, ML350 4Matic, ML400 4Matic, ML63 AMG, and 2016 GLE450 AMG 4Matic vehicles manufactured from April 27, 2015, through May 19, 2015. The affected vehicles may have had the right rear seatbelt anchor bolt incorrectly installed.
Risk: In the event of a vehicle crash, the right rear seatbelt anchor bolt could fail to secure the passenger, increasing their risk of injury.
NHTSA campaign 15V351000 · reported Jun 8, 2015 · 814 vehicles potentially affected across the whole campaign
Remedy: Mercedes will notify owners, and dealers will replace the chain tensioner gasket, free of charge. The recall began on June 23, 2015. Owners may contact Mercedes customer service at 1-800-367-6372. Mercedes' number for this recall is 2015050005. Note: This is an expansion of NHTSA recall 14V-762.
Mercedes-Benz USA, LLC (Mercedes) is recalling certain model year 2015 E250 BlueTec vehicles manufactured November 3, 2014, to December 15, 2014, E250 BlueTec 4Matic vehicles manufactured November 4, 2014, December 17, 2014, GLK250 vehicles manufactured November 13, 2014, to January 30, 2015, and 2015 ML250 BlueTec vehicles manufactured December 12, 2014, to February 9, 2015. In the affected vehicles, oil may leak from around the chain tensioner gasket area.
Risk: Leaking oil may drip onto a hot engine surface, increasing the risk of a fire. Additionally, the leaking oil may be a road hazard for other vehicles, increasing the risk of a crash.
NHTSA campaign 14V762000 · reported Dec 1, 2014 · 4,871 vehicles potentially affected across the whole campaign
Remedy: Mercedes will notify owners, and dealers will replace the chain tensioner gasket, free of charge. The recall began on December 19, 2014. Owners may contact Mercedes customer service at 1-800-367-6372. Mercedes' number for this recall is 2014120002.
Mercedes-Benz USA, LLC (Mercedes) is recalling certain model year 2014-2015 E250 BlueTec, E250 BlueTec 4Matic, GLK250 4Matic BlueTec, and 2015 ML250 4Matic BlueTec vehicles manufactured February 28, 2014, to November 10, 2014. In the affected vehicles, oil may leak from around the chain tensioner gasket area.
Risk: Leaking oil may drip onto a hot engine surface, increasing the risk of a fire. Additionally, the leaking oil may be a road hazard for other vehicles, increasing the risk of a crash.
Carmakers sent NHTSA 163 service bulletins and notices that cover the 2015 ML-Class, the latest on Sep 26, 2026. They tell dealers how to fix known issues.
The parts they mention most: electrical system (31), power train (27), engine and engine cooling (20), engine (19), equipment (17).
NHTSA hasn't opened a defect investigation that covers this model year.
Maintenance
Oil
The owner's manual gives the oil and how often to change it. We show oil facts only once we've checked them against the manual, and we haven't yet for the 2015 ML-Class.
EPA class: standard sport utility vehicle. EPA greenhouse gas score: 3–5 out of 10. Each version EPA tested:
Swipe the table sideways for more columns.
Version
Engine
Transmission
Fuel
City / hwy / comb
ML250 Bluetec 4matic 4-Wheel Drive
2.1 L, 4 cyl, turbo
Automatic 7-spd
Diesel
22 / 29 / 25
ML350 Rear-Wheel Drive
3.5 L, 6 cyl
Automatic 7-spd
Premium Gasoline
18 / 23 / 20
ML350 4matic 4-Wheel Drive
3.5 L, 6 cyl
Automatic 7-spd
Premium Gasoline or E85
18 / 22 / 19
ML350 4matic 4-Wheel Drive
3.5 L, 6 cyl
Automatic 7-spd
Premium Gasoline
18 / 22 / 19
ML400 4matic 4-Wheel Drive
3.0 L, 6 cyl, turbo
Automatic 7-spd
Premium Gasoline
18 / 22 / 20
ML63 AMG 4-Wheel Drive
5.5 L, 8 cyl, turbo
Automatic 7-spd
Premium Gasoline
13 / 17 / 15
Sources and dates
U.S. EPA fuel economy data, file of Sep 29, 2026
NHTSA owner complaints, file of Oct 18, 2026
NHTSA recalls, file of Oct 18, 2026
NHTSA manufacturer communications, file of Oct 18, 2026
NHTSA defect investigations, file of Oct 18, 2026
NHTSA 5-Star Safety Ratings, file of Aug 7, 2026
U.S. Energy Information Administration, file of Oct 12, 2026
Fuel cost: EPA mpg with fuel prices for the week of Oct 12, 2026 and electricity prices for Jul 2026. Source: U.S. Energy Information Administration (Oct 2026). Complaints are unverified reports owners filed with NHTSA. About the data