2014 Mercedes-Benz ML350 Engine Problems
- Complaints
- 16about this part
- Share
- 24%of 68 total for the year
- Median mileage
- 16,000miles
- Trend
- RisingComplaints filed in the last 3 full calendar years are at least 25% higher than in the 3 years before.
NHTSA recorded 16 complaints about the engine of the 2014 Mercedes-Benz ML350, 24% of the 68 complaints for this model year. Where a mileage was given, the median is 16,000 miles.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“I bought this vehicle new on march 2013. With the time we hear a strange noise, we thought it was normal but that noise was stronger so we went to the dealer garage isla verde mercedes benz, to the maintenance we told to the person about that noise, so they said to us that everything is ok then we ask about the noise in the engine and they told that is a problem in the engine and mercedes benz knows that, is an intern engine problem and there is a part that can't be changed! And also others models like glk, e and ml have the same problem .. …”
NHTSA complaint #10692799, filed 2015-03, 14,000 miles“Car engine light on. Took to service center. Required software upgrade. Cost $275. Car has 26k miles. This should not be an expense to buyer but should be a warranty issue. Very unhappy with Mercedes-Benz and unlikely to purchase you vehicle in the future. Also, no obvious instruction for checking oil level. Another ruse by Mercedes-Benz to wring additional $$ out if consumers.”
NHTSA complaint #11094095, filed 2018-05, 26,000 miles“I am writing in regards to my 2014 ML 350 Suv. The check engine light came on and upon taking it to the mercedes dealership, I was told the issue is that the camshaft adjusters have failed and need to be replaced. The cost quoted is over $11,000 to repair. Upon further investigation I found reports on multiple lawsuits for the Mercedes C series for the same year (2012-2014) that resulted also in a recall whereby customers were given a recall to replace at no charge the camshaft adjusters up to 120k miles. …”
NHTSA complaint #11511621, filed 2023-03“I purchased my car used at the Mercedes dealership in Tyler Texas June 2023. I took all my savings and paid cash and was told that the car was impeccable shape and there were no current issues and all the service records were up to date. November 2023 is when everything started happening and my engine light came on. It was revealed to me by a service tech that I was sold the vehicle with an existing major oil leak /seals broke. Etc. SEE Attached invoices. I have endured driving down the road and my car just giving out and losing power steering. …”
NHTSA complaint #11657305, filed 2025-04“I bought my vehicle into Mercedes Benz for a recall related to water collection in spare tire well which can cause a fuel pump control malfunction, NHTSA recall # 22V955. A few days ago, my vehicle could not start and I found water in my spare tire well. My OBD scanner tells me it is related to the fuel pump. I informed Mercedes Benz and they would not fix it. Obviously the work performed did not correct the recall. I'm writing here hoping I can get connected to the right channel to get this resolved as my vehicle is currently unusable. Thanks.”
NHTSA complaint #11549073, filed 2023-10Related service bulletins
- 11017039Apr 1, 2025Complaint Vehicle with atypical reduced heat output. Cause Silicate granulate may have escaped from a damaged bag in the expansion reservoir (not visible), reducing the coolant…
- 11008064Aug 9, 2024In our continuing efforts to ensure the proper performance and quality of your vehicle, we are writing to inform you that on certain Model Year 2011-2018 C-Class, E-Class…
- 11031622Oct 2, 2023This NCU replaces the prior NCU issued on August 19, 2022, and removes specific fault codes list. Mercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz vehicles, has…
- 11031736Sep 6, 2023In our continuing efforts to assure the proper performance of Mercedes-Benz products and to enhance the satisfaction of our customers, Mercedes-Benz USA ("MBUSA") is extending…
- 11031655Sep 1, 2022The purpose of this letter is to advise you of additional benefits that Mercedes-Benz USA, LLC ("MBUSA") is providing to you regarding your vehicle ownership. What's Included In…
- 11031648Oct 5, 2021Mercedes-Benz USA, LLC will provide an Extended Modification Warranty for each vehicle that has received the Approved Emission Modification. The Extended Modification Warranty…
- 11031656Nov 6, 2020Dear Mercedes-Benz Owner: The purpose of this letter is to advise you of additional benefits that Mercedes-Benz USA, LLC (“MBUSA”) is providing to you regarding your vehicle…
- 11031625Nov 6, 2020Mercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz vehicles, has determined that on certain Model Year (“MY”) 2012-2016 Mercedes-Benz Model 212, 221, X204 and 166…
- 10160738Apr 11, 2019Update engine electronics (ME-SFI) control unit software
- 10058563Jul 6, 2015Xentry (mercedes): stored in engine control unit (ecu) is fault to exhaust back pressure sensor causing engine to be in limp home mode and diagnosis warning lamp activated. Model…
Engine: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2015 | 11 | 21% |
| 2014 | 16 | 24% |
| 2013 | 13 | 23% |
| 2012 | 21 | 32% |
| 2011 | 7 | 6% |
| 2010 | 5 | 5% |
| 2008 | 3 | 4% |
| 2007 | 5 | 6% |
| 2006 | 36 | 21% |
| 2005 | 1 | 4% |
| 2004 | 2 | 6% |
| 2003 | 2 | 8% |
Other parts of the 2014 Mercedes-Benz ML350
20 complaintsOther or unknown
17 complaintsFuel system
12 complaintsLane departure
5 complaintsBody and structure
5 complaintsAir bags
4 complaintsSteering
4 complaintsTransmission and drivetrain
4 complaintsVehicle speed control
3 complaintsVisibility (wipers, defrost, mirrors)
3 complaintsExterior lighting
2 complaintsWheels
2 complaints
← All problems reported for the 2014 Mercedes-Benz ML350
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology