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Mercedes-Benz GLC 300Model year report

2024 Mercedes-Benz GLC 300 Problems

Compared with other Mercedes-Benz GLC 300 years

Too new to compare

Nearby years with a typical complaint level and no open NHTSA investigation: 2021, 2022

Based only on NHTSA complaints, recalls and investigations. Not adjusted for how many vehicles were sold, and not a reliability rating. How this is calculated

Complaints
21filed with NHTSA
Median mileage
2,174miles, 3 complaints with mileage
Recalls
8campaigns on record
Trend
Too newThis model year is less than 4 years old, so a trend is not meaningful yet.
NHTSA crash rating
—no overall rating published
EPA fuel economy
29 mpgcombined, 2.0L 4-cyl · hybrid RWD · 26 city / 33 hwy

Sources: NHTSA records for the 2024 Mercedes-Benz GLC 300 (complaints, recalls, investigations), EPA fuel economy. Report an error

NHTSA recorded 21 consumer complaints for the 2024 Mercedes-Benz GLC 300. The part named most often is engine, with 7 complaints (33% of the total), followed by electrical system (6) and transmission and drivetrain (5). 3 of the complaints include a mileage, and 67% of those were filed for vehicles with under 50,000 miles; the median is 2,174 miles. Of all complaints, 1 involved a crash, 2 an injury, according to the filers. NHTSA lists 8 recall campaigns and 287 technical service bulletins for this model year. Engine complaints overlap with 10 technical service bulletins filed under the same part. Electrical system complaints overlap with 2 recall campaigns covering the fuses and circuit breakers and 158 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: Visibility (wipers, defrost, mirrors) (1).

Example complaints

Engine: “While driving the vehicle the engine started running rough, check engine light illuminated and it would not accelerate above 40 mph. There are 29,100 miles on the vehicle, it's been serviced on schedule by Mercedes and is owned by me since new. It is especially concerning due to the acceleration topic which could have been catastrophic if I were trying to merge into traffic. Dealer service say the camshaft bearing needs to be replaced. It seems this is very premature for the mileage on the vehicle.”

NHTSA complaint #11741752, filed 2026-06

Electrical system: “Check engine light appears, also a blue engine and a turtle. The dealer is aware, they have had it 3times for the same issue and this time 23 days and counting. Currently Mercedes has no fix. I purchased the veh 30 Nov 23- first appeared 16 dec and continued going on and off.”

NHTSA complaint #11574918, filed 2024-03

Transmission and drivetrain: “•Incident Details: •Both sudden shutdown incidents •“12V Battery” warning (first incident) •“Stop - Switch Off Vehicle” warning (second incident) •That it happened with children in the car on a tollway Safety Concerns: •Loss of power steering/braking •Risk of collision •Repeated failures on a 1-year-old vehicle”

NHTSA complaint #11677934, filed 2025-08

Brakes: “3/31/26 2pm After highway driving - 3 miles/35 mph tried to brake- Immediately something was wrong with the brake as and it felt spongy/mushy/unresponsive. Car did not slow until I pressed the brake fully to the floor. The car did stop &was alarmingly unresponsive. Around this time,noticed the white BRAKE light illuminated. Continued to drive - terrified. Had to brake VERY HARD to get car to slow/stop. at home, Quick google search had me try turning on and off parking brake - tied this 5-6 times and white BRAKE light went off and I could brake/stop car. …”

NHTSA complaint #11730496, filed 2026-04

Mileage when problems were reported

67% of the 3 complaints with a mileage were filed for vehicles with under 50,000 miles; the middle half falls between 1,800 and 97,000 miles.

67%0–100%10–250%25–500%50–7533%75–1000%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: 2,174 miles.

Complaints by year filed

This model year is less than 4 years old, so a trend is not meaningful yet.

202320241420252026
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 2024 Mercedes-Benz GLC 300 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
GLC300 RWD2.0L 4-cyl · hybrid9-speed automatic263329$2,850

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

See all 8 recalls for the 2024 Mercedes-Benz GLC 300 → · 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. 287 on record; the latest 10 are shown.

See all 287 bulletins →

Other model years of the Mercedes-Benz GLC 300

YearComplaintsMedian miRecallsCrash ★MPGScore (50 = typical)Trend
2025164,7003—27—Too new
2024212,1748—29—Too new
2023558,50012—2867 · MoreToo new
20226110,000252439 · TypicalRising
20216726,0009—2552 · TypicalRising
20206921,25016—2454 · TypicalRising
20194741,500125240 · FewerRising
20188710,5001252448 · TypicalRising
201710129,41612—2444 · TypicalRising
201613311,00012—2480 · MoreFalling

All Mercedes-Benz GLC 300 model years · Best and worst years by complaints

Frequently asked questions

How many NHTSA complaints does the 2024 Mercedes-Benz GLC 300 have?

NHTSA recorded 21 consumer complaints for the 2024 Mercedes-Benz GLC 300 as of Oct 27, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

What part of the 2024 Mercedes-Benz GLC 300 is reported most often?

Engine is named most often, in 7 complaints (33% of the total), followed by electrical system with 6.

Has the 2024 Mercedes-Benz GLC 300 been recalled?

NHTSA lists 8 recall campaigns for this model year. To check a specific vehicle, enter its VIN at nhtsa.gov/recalls.

What gas mileage does the 2024 Mercedes-Benz GLC 300 get?

The EPA rates the 2024 Mercedes-Benz GLC 300 (GLC300, 2.0L 4-cyl · hybrid) at 29 mpg combined, 26 city and 33 highway, with an estimated annual fuel cost of $2,850 at 15,000 miles a year. Other engine and drive versions are rated differently.

At what mileage are problems with the 2024 Mercedes-Benz GLC 300 reported?

Among the 3 complaints that include a mileage, the median is 2,174 miles and the middle half falls between 1,800 and 97,000 miles; 67% were filed for vehicles with under 50,000 miles.

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 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.