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Mercedes-Benz GL550Model year report

2015 Mercedes-Benz GL550 Problems

Complaints
8filed with NHTSA
Median mileage
2,200miles, 1 complaints with mileage
Recalls
3campaigns on record
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA crash rating
—no overall rating published
EPA fuel economy
15 mpgcombined, 4.7L 8-cyl 4WD · 13 city / 18 hwy

Sources: NHTSA records for the 2015 Mercedes-Benz GL550 (complaints, recalls, investigations), EPA fuel economy. Report an error

NHTSA recorded 8 consumer complaints for the 2015 Mercedes-Benz GL550. The part named most often is engine, with 4 complaints (50% of the total), followed by other or unknown (2) and brakes (1). 1 of the complaints include a mileage, and 100% of those were filed for vehicles with under 50,000 miles; the median is 2,200 miles. Of all complaints, 1 a fire, according to the filers. NHTSA lists 3 recall campaigns and 85 technical service bulletins for this model year. Engine complaints overlap with 5 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.

Example complaints

Engine: “Upon receipt of vehicle, when the weather was nice, a rattle in the engine compartment appeared to take place intermittently. Upon diagnosis by a dealership, intermittent was confirmed to take place on a cold start, and not intermittently. Upon further research, it was found the rattle is related to a manufacturer's defect with the timing chain tensioner(s) and their interaction with the valves. My safety was put at risk substantially. I live in the cold upper midwest. …”

NHTSA complaint #11508624, filed 2023-02

Other or unknown: “My car has an ongoing problem with the HVAC system. It generates a mold and mildew smell while using the AC and heat. Mercedes says they no of this issue but have no permanent fix. The smell is so bad that it is almost un-drivable. Mercedes dealerships have bulletins that denote the issue is known, but their work around only temporarily improves the smell. There is an obvious engineering issue with the HVAC system that is unhealthy. There is apparently that forms around the mold around the AC evaporator. Mercedes has an internal alert # TSB li83-30-p-059119. …”

NHTSA complaint #10933757, filed 2016-12, 2,200 miles

Brakes: “On 8/5/2026, the power boost on the vehicle was lost while at a nearby shopping center. Braking became very difficult and it was dangerous to drive even a little distance. There were no warning lights from the vehicle. We had it towed to an independent repair shop where they determined the brake booster had failed. They did a recall check and saw that it didn't apply to our specific vehicle. They repaired it which cost $2500. Later, we did research and found that there is an expanded recall, 22V315000, which includes our year, make, and model! …”

NHTSA complaint #11762852, filed 2026-09

Mileage when problems were reported

100% of the 1 complaints with a mileage were filed for vehicles with under 50,000 miles; the middle half falls between 2,200 and 2,200 miles.

100%0–100%10–250%25–500%50–750%75–1000%100–1500%150+
Share of complaints by mileage when the problem was reported, in thousands of miles (1 complaints with mileage). Red bars: under 50,000 miles. Bucket widths differ. Median: 2,200 miles.

Complaints by year filed

Fewer than 15 complaints, too few for a reliable trend.

20162022220232202420262
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 2015 Mercedes-Benz GL550 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
GL550 4matic 4WD4.7L 8-cyl7-speed automatic131815$5,500

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 2015 Mercedes-Benz GL550 → · 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. 85 on record; the latest 10 are shown.

See all 85 bulletins →

Other model years of the Mercedes-Benz GL550

YearComplaintsMedian miRecallsCrash ★MPGScore (50 = typical)Trend
201582,2003—15—Not enough data
20141033,5003—15—Not enough data
2013662,6863—15—Not enough data
2012861,0003—14—Not enough data
20111569,0003—14—Rising
2009694,6003—14—Not enough data
20081295,5002—14—Not enough data

All Mercedes-Benz GL550 model years

Frequently asked questions

How many NHTSA complaints does the 2015 Mercedes-Benz GL550 have?

NHTSA recorded 8 consumer complaints for the 2015 Mercedes-Benz GL550 as of Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

What part of the 2015 Mercedes-Benz GL550 is reported most often?

Engine is named most often, in 4 complaints (50% of the total), followed by other or unknown with 2.

Has the 2015 Mercedes-Benz GL550 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 2015 Mercedes-Benz GL550 get?

The EPA rates the 2015 Mercedes-Benz GL550 (GL550 4matic, 4.7L 8-cyl) at 15 mpg combined, 13 city and 18 highway, with an estimated annual fuel cost of $5,500 at 15,000 miles a year. Other engine and drive versions are rated differently.

At what mileage are problems with the 2015 Mercedes-Benz GL550 reported?

Among the 1 complaints that include a mileage, the median is 2,200 miles and the middle half falls between 2,200 and 2,200 miles; 100% were filed for vehicles with under 50,000 miles.

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. 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.