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Mercedes-Benz GL450Model year report

2014 Mercedes-Benz GL450 Problems

Complaints
21filed with NHTSA
Median mileage
56,000miles, 10 complaints with mileage
Recalls
3campaigns on record
Trend
RisingComplaints filed in the last 3 full calendar years are at least 25% higher than in the 3 years before.
NHTSA crash rating
—no overall rating published
EPA fuel economy
16 mpgcombined, 4.7L 8-cyl 4WD · 14 city / 19 hwy

Sources: NHTSA records for the 2014 Mercedes-Benz GL450 (complaints, recalls, investigations), EPA fuel economy. Report an error

NHTSA recorded 21 consumer complaints for the 2014 Mercedes-Benz GL450. The part named most often is engine, with 7 complaints (33% of the total), followed by electrical system (3) and other or unknown (3). 10 of the complaints include a mileage, and 40% of those were filed for vehicles with under 50,000 miles; the median is 56,000 miles. NHTSA lists 3 recall campaigns and 82 technical service bulletins for this model year. Engine complaints overlap with 5 technical service bulletins filed under the same part. Electrical system complaints overlap with 29 technical service bulletins filed under the same part.

This model year has fewer than 25 complaints on record, so the numbers below can change a lot with a few new reports.

Which parts are reported most

Complaints can name more than one part, so the counts add up to more than the total. Select a part to see its complaints, recalls and bulletins.

Also reported: Body and structure (1), Suspension (1), Wheels (1).

Example complaints

Engine: “There were numerous Engine Oil Leak Recalls by Mercedes-Benz. There was a recent recalls announced in 2023, however, my vehicle 2014 GL450 with now about 50K miles, was not included in the list. Since there have been engine oil leaks problem reported and recalls, I'd like to report my car engine oil leaks problem too. It seems that the engine oil leaks problem is a design issue and across many car models and years made by Mercedes-Benz. With that said, it make safety sense to have the recalls extended to those cars with engine oil leaks problem reported. …”

NHTSA complaint #11654331, filed 2025-04

Electrical system: “Oil leaking and wicking into camshaft position sensors, camshaft magnets, O2 sensors, engine wiring harness and ultimately, the ECU is destroying all electronic components connected to the engine causing misfiring and seizing. The issue is quite prevalent via internet research as potentially thousands of owners all experience the same issue. Our local Mercedes Benz dealer indicated this issue just popped up immediately outside the warranty period (1 yr) for our used purchase, and would require a replacement of the camshaft, sensors, magnets, and wiring harness to the tune of $14,000. …”

NHTSA complaint #11457964, filed 2022-03

Other or unknown: “Sunroof exploded as I was driving down the freeway. Roadway was smooth and there were no cars in front of me so I'm certain it wasn't a rock or other object that broke it.”

NHTSA complaint #11184270, filed 2019-03, 67,000 miles

Visibility (wipers, defrost, mirrors): “While driving on the freeway at about 70 MPH the sunroof exploded. We were not behind another car and driving in the middle of an unpopulated area along the !-10 freeway.”

NHTSA complaint #10948508, filed 2017-01, 45,000 miles

Mileage when problems were reported

40% of the 10 complaints with a mileage were filed for vehicles with under 50,000 miles; the middle half falls between 30,180 and 67,000 miles.

20%0–100%10–2520%25–5040%50–750%75–10020%100–1500%150+
Share of complaints by mileage when the problem was reported, in thousands of miles (10 complaints with mileage). Red bars: under 50,000 miles. Bucket widths differ. Median: 56,000 miles.

Complaints by year filed

Trend: rising. Complaints filed in the last 3 full calendar years are at least 25% higher than in the 3 years before.

201532019202132023332025
Complaints by year the complaint was filed with NHTSA. Red bars: the last 3 full calendar years used for the trend. The current year (2026) is partial.

Fuel economy and running cost

EPA ratings for each 2014 Mercedes-Benz GL450 version. Annual fuel cost is the EPA's estimate at its current fuel prices for 15,000 miles a year (55% city driving).

VersionEngineTransmissionCityHwyComb.Fuel / yr
GL450 4matic 4WD4.7L 8-cyl7-speed automatic141916$5,150

Source: U.S. EPA and Department of Energy, fueleconomy.gov. Ratings are for comparing vehicles; real-world mileage varies with driving and conditions.

Recalls and investigations

Recall details for the 2014 Mercedes-Benz GL450 → · Check a VIN at nhtsa.gov/recalls

Technical service bulletins

TSBs are manufacturer notes to dealers about known repair procedures. They are not recalls and do not by themselves mean a vehicle has a fault. 82 on record; the latest 10 are shown.

See all 82 bulletins →

Other model years of the Mercedes-Benz GL450

YearComplaintsMedian miRecallsCrash ★MPGScore (50 = typical)Trend
2016135,0005—19—Not enough data
20151838,5083—19—Falling
20142156,0003—16—Rising
20133724,0003—1650 · TypicalStable
20124757,5003—150 · FewerFalling
20115573,0003—1550 · TypicalRising
20104292,1383—140 · FewerStable
200915121,0003—15—Falling
20085569,0002—1552 · TypicalStable
200711580,0002—15Not compared (before 2008)Falling

All Mercedes-Benz GL450 model years · Best and worst years by complaints

Frequently asked questions

How many NHTSA complaints does the 2014 Mercedes-Benz GL450 have?

NHTSA recorded 21 consumer complaints for the 2014 Mercedes-Benz GL450 as of Nov 1, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

What part of the 2014 Mercedes-Benz GL450 is reported most often?

Engine is named most often, in 7 complaints (33% of the total), followed by electrical system with 3.

Has the 2014 Mercedes-Benz GL450 been recalled?

NHTSA lists 3 recall campaigns for this model year. To check a specific vehicle, enter its VIN at nhtsa.gov/recalls.

What gas mileage does the 2014 Mercedes-Benz GL450 get?

The EPA rates the 2014 Mercedes-Benz GL450 (GL450 4matic, 4.7L 8-cyl) at 16 mpg combined, 14 city and 19 highway, with an estimated annual fuel cost of $5,150 at 15,000 miles a year. Other engine and drive versions are rated differently.

At what mileage are problems with the 2014 Mercedes-Benz GL450 reported?

Among the 10 complaints that include a mileage, the median is 56,000 miles and the middle half falls between 30,180 and 67,000 miles; 40% were filed for vehicles with under 50,000 miles.

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Nov 1, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate. Fuel economy is from the EPA and DOE (fueleconomy.gov).

Complaint counts come from NHTSA’s public complaint database; we count each complaint once. The source records for this vehicle are on nhtsa.gov. Scores and trends are our own summaries of that data, described in the methodology. This page is not legal, safety or repair advice: for a specific vehicle, check its VIN at nhtsa.gov/recalls and ask a qualified mechanic. See an error? Tell us.