2021 Mercedes-Benz Glc 300: Recalls, Problems & MPG
Here are the deets on the 2021 Mercedes-Benz Glc 300: 9 recalls, 67 owner complaints and up to 25 mpg combined.
Recalls
9 vehicle recalls from the manufacturer. Repairs are free. Check your VIN to see if one is still open on your car.
Communication, Electrical Vehicle recall #21V058000 · 2021 · 1,292,258 vehicles
What's wrong: Please refer to the part 573 report for specific vehicle model details. The software design of the communication module May fail to communicate the correct vehicle location for the emergency call system (ecall) in the event of a crash.
Why it matters: Failure of the ecall system May result in emergency responders being dispatched to the wrong location, increasing the risk of injury following a crash.
The fix: Mbusa will notify owners, and the communication module software will be updated by a dealer, or through an over-the-air (ota) update, free of charge. The recall began March 12, 2021.
Communication, Communication Vehicle recall #21V072000 · 2021 · 67 vehicles
What's wrong: On June 18, 2021, an additional 9 vehicles were added, including certain 2021 gla250, glc300, 2018 s450, e400, and 2017 cla250 vehicles. The communication module might have been inadvertently deactivated during a service visit, which could have disabled the emergency call (ecall) function.
Why it matters: A disabled ecall system would prevent a vehicle occupant from contacting emergency services through the call center in an emergency, potentially delaying emergency responders and increasing the risk of injury.
The fix: Mbusa will notify owners, and dealers will inspect the communication module and activate it, if necessary, free of charge. The recall began March 31, 2021. Letters for the owners of the 9 additional vehicles were mailed July 9, 2021.
Seat belts, Airbags Vehicle recall #21V230000 · 2021 · 8,634 vehicles
What's wrong: Please refer to mbusa's recall report for specific vehicle model details. A faulty electrical contact within the seat position switch May prevent the driver and passenger air bags and seat belt force limiters from properly activating during a crash.
Why it matters: Air bags and seat belts that do not perform properly in a crash can increase the risk of injury.
The fix: Mbusa will notify owners, and dealers will replace the seat position switches, free of charge. Owner letters were mailed May 21, 2021.
Backup camera, Electrical Vehicle recall #21V354000 · 2021 · 343,191 vehicles
What's wrong: Please refer to mbusa's recall report for specific vehicle model details. The mbux multimedia system software May cause the display to remain black, or reboot after startup. This could result in the rearview camera image not displaying properly. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (fmvss) number 111, "rear visibility."
Why it matters: A backup camera that displays a blank image reduces the driver's rear view, increasing the risk of a crash or injury.
The fix: The multimedia system software will be updated by a dealer, or through an over-the-air (ota) update, free of charge. Owner notification letters were mailed beginning June 28, 2021.
Airbags Vehicle recall #21V527000 · 2021 · 542 vehicles
What's wrong: The side crash sensor connectors May come loose, which could delay the activation of air bags and seatbelts during a side impact crash.
Why it matters: Air bags and seatbelts that don't function as intended can increase the risk of injury during a crash.
The fix: Dealers will inspect and replace as necessary, the side impact crash sensors, free of charge. Owner notification letters were mailed on September 3, 2021.
Exterior lights Vehicle recall #22V261000 · 2022 · 129 vehicles
What's wrong: The electrical connection for the headlights May not be watertight, which can result in headlight failure.
Why it matters: Headlight failure can decrease visibility for both the driver and surrounding traffic, increasing the risk of a crash.
The fix: Dealers will inspect and replace the headlight sealing plugs, as necessary, free of charge. Owner notification letters were mailed June 3, 2022.
Communication, Electrical Vehicle recall #22V365000 · 2022 · 242,722 vehicles
What's wrong: Please refer to mbusa's recall report for specific vehicle model details. An error in the communication module's sim card software can cause a mobile network connection failure, disabling the emergency call (ecall) system.
Why it matters: A disabled ecall system would prevent a vehicle occupant from contacting the emergency services call center in an emergency, potentially delaying emergency responders and increasing the risk of injury.
The fix: The communication module software will be updated through an over-the-air (ota) update or by a dealer, free of charge. Owner notification letters were mailed July 8, 2022. Owner notification letters will be mailed in phases, on July 8, 2022, May 17, 2024, July 29, 2024, and September 27, 2024.
Fuel system Vehicle recall #23V445000 · 2023 · 143,551 vehicles
What's wrong: Please refer to mbusa's recall report for specific vehicle details. The fuel pump May shutdown, which can result in a loss of drive power.
Why it matters: A loss of drive power can increase the risk of a crash.
The fix: Dealers will replace the fuel pump, free of charge. Owner notification letters were mailed on June 14, 2024.
Exterior lights Vehicle recall #24V070000 · 2024 · 15,502 vehicles
What's wrong: The headlights May be incorrectly adjusted too high and create a glare for oncoming traffic. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 108, "lamps, reflective devices, and associated equipment."
Why it matters: Incorrectly aimed headlights can reduce the visibility of oncoming traffic, increasing the risk of a crash.
The fix: Dealers will inspect the headlight adjustment and correct it if necessary, free of charge. Owner notification letters were mailed February 23, 2024.
Most-reported problems
Owner complaints filed with NHTSA, by component. One complaint can list several components. 2 mention a fire, 1 injuries and 0 deaths were reported.
What owners describe
- Engine (30): the most common themes are warning light on (17), stalls / loses power (8).
- Exterior lights (13): the most common themes are electrical failure (3), rust / corrosion (2).
- Fuel & propulsion (10): the most common themes are stalls / loses power (3), warning light on (2).
- Electrical (8): the most common themes are electrical failure (3), warning light on (2).
The 2021 Mercedes-Benz Glc 300 has 67 owner complaints, ranking #3 of 9 Glc 300 model years for complaints (about average; the typical year has 47). Complaints peaked in 2025 (18 filed that year). The typical problem showed up when the car was about 3 years old, at a median of 26,000 miles. Neighboring years: 2020 (69 complaints, 16 recalls), 2022 (60 complaints, 2 recalls).
Engines & fuel economy (EPA)
| Engine | Transmission | Drive | City | Hwy | Comb. | Fuel |
|---|---|---|---|---|---|---|
| 2.0 L 4-cyl turbo | Automatic 9-spd | Rear-Wheel Drive | 22 | 29 | 25 | Premium |
Want the full repair deets? Get the factory manual.
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FAQ
Does the 2021 Mercedes-Benz Glc 300 have any recalls?
Yes. NHTSA lists 9 vehicle recalls for the 2021 Mercedes-Benz Glc 300. Recall repairs are free at any dealer, no matter how old the car is. Check your VIN at nhtsa.gov/recalls.
What are the most common 2021 Mercedes-Benz Glc 300 problems?
Owners have filed 67 complaints with NHTSA. The most-reported areas are engine (30), exterior lights (13), fuel & propulsion (10).
What gas mileage does the 2021 Mercedes-Benz Glc 300 get?
EPA ratings run up to 25 mpg combined (2.0 L, Automatic 9-spd), across 1 engine and transmission combos.
Where can I get a 2021 Mercedes-Benz Glc 300 repair manual?
eManualOnline sells downloadable manuals, Mitchell 1 DIY and ALLDATAdiy sell online access to factory repair data, and Haynes sells printed guides and online access. Pick a download if you want to keep it, or a subscription for wiring diagrams and TSBs.