Skip to content
EnginePart report

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 2023-10

Related service bulletins

Engine: other model years

YearComplaintsShare of year
20151121%
20141624%
20131323%
20122132%
201176%
201055%
200834%
200756%
20063621%
200514%
200426%
200328%

Other parts of the 2014 Mercedes-Benz ML350

Electrical system
20 complaints
Other or unknown
17 complaints
Fuel system
12 complaints
Lane departure
5 complaints
Body and structure
5 complaints
Air bags
4 complaints
Steering
4 complaints
Transmission and drivetrain
4 complaints
Vehicle speed control
3 complaints
Visibility (wipers, defrost, mirrors)
3 complaints
Exterior lighting
2 complaints
Wheels
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