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Mercedes-Benz GLS 550Model year report

2017 Mercedes-Benz GLS 550 Problems

Complaints
6filed with NHTSA
Median mileage
54,000miles, 3 complaints with mileage
Recalls
5campaigns 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
16 mpgcombined, 4.7L 8-cyl 4WD · 14 city / 18 hwy

Sources: NHTSA records for the 2017 Mercedes-Benz GLS 550 (complaints, recalls, investigations), EPA fuel economy. Report an error

NHTSA recorded 6 consumer complaints for the 2017 Mercedes-Benz GLS 550. The part named most often is other or unknown, with 3 complaints (50% of the total), followed by engine (1) and fuel system (1). 3 of the complaints include a mileage, and 33% of those were filed for vehicles with under 50,000 miles; the median is 54,000 miles. NHTSA lists 5 recall campaigns and 82 technical service bulletins for this model year. Other or unknown complaints overlap with 3 technical service bulletins filed under the same part. Engine complaints overlap with 1 technical service bulletin 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

Other or unknown: “I purchased a 2017 gls 550 in january 2018 from loeber motors in lincolnwood illinois. The sticker on the vehicle represented that there were 'all season' tires on the vehicle. After numerous guarantees from the salesmen, I was assured that the vehicle would be 'safe' on the factory tires as they were represented as all season. It was not until I found myself driving through a spring snowstorm in wisconsin that I realized that there was something terribly wrong with the way the vehicle was handling in the storm. …”

NHTSA complaint #11092420, filed 2018-05, 11,000 miles

Engine: “We had our Mercedes GLS550 2017 with 59,295 overheat and call for immediate shut down on the Massachusetts Turnpike with my wife and child in the car. It was quite a dangerous situation because the failure caused by hose assembly 166-830-15-00 clamp (as described by the dealer as the reason for the loss of fluid and hose failure) caused almost an immediate overheating. The service advisor stated that it is a quite common failure . …”

NHTSA complaint #11444249, filed 2021-12

Transmission and drivetrain: “Rear axle lock up briefly made a sound like someone rear ended the car and snap the left side rear cv axle. Vehicle is awd and does not move on its own power.. Shop tow SUV and on the air found the axle inner joint just spins but car does not move, they pulled the axle and the is metal burnt into the axle shaft seems rear diff lock up, oil was clean on the differential.”

NHTSA complaint #11340655, filed 2020-07, 105,110 miles

Mileage when problems were reported

33% of the 3 complaints with a mileage were filed for vehicles with under 50,000 miles; the middle half falls between 11,000 and 105,110 miles.

0%0–1033%10–250%25–5033%50–750%75–10033%100–1500%150+
Share of complaints by mileage when the problem was reported, in thousands of miles (3 complaints with mileage). Red bars: under 50,000 miles. Bucket widths differ. Median: 54,000 miles.

Complaints by year filed

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

201720182020202122025
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 2017 Mercedes-Benz GLS 550 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
GLS550 4matic 4WD4.7L 8-cyl9-speed automatic141816$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 2017 Mercedes-Benz GLS 550 → · 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 GLS 550

YearComplaintsMedian miRecallsCrash ★MPGScore (50 = typical)Trend
201867,0003—16—Not enough data
2017654,0005—16—Not enough data

All Mercedes-Benz GLS 550 model years

Frequently asked questions

How many NHTSA complaints does the 2017 Mercedes-Benz GLS 550 have?

NHTSA recorded 6 consumer complaints for the 2017 Mercedes-Benz GLS 550 as of Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

What part of the 2017 Mercedes-Benz GLS 550 is reported most often?

Other or unknown is named most often, in 3 complaints (50% of the total), followed by engine with 1.

Has the 2017 Mercedes-Benz GLS 550 been recalled?

NHTSA lists 5 recall campaigns for this model year. To check a specific vehicle, enter its VIN at nhtsa.gov/recalls.

What gas mileage does the 2017 Mercedes-Benz GLS 550 get?

The EPA rates the 2017 Mercedes-Benz GLS 550 (GLS550 4matic, 4.7L 8-cyl) at 16 mpg combined, 14 city and 18 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 2017 Mercedes-Benz GLS 550 reported?

Among the 3 complaints that include a mileage, the median is 54,000 miles and the middle half falls between 11,000 and 105,110 miles; 33% 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.