2020 Mercedes-Benz Glc 300: Recalls, Problems & MPG
Here are the deets on the 2020 Mercedes-Benz Glc 300: 16 recalls, 69 owner complaints and up to 24 mpg combined.
Recalls
16 vehicle recalls from the manufacturer. Repairs are free. Check your VIN to see if one is still open on your car.
Forward collision avoidance Vehicle recall #19V540000 · 2019 · 1,957 vehicles
What's wrong: Mercedes-benz USA, LLC. (mbusa) is recalling certain 2019 c300 cabrio, c300a cabrio 4matic, c300 coupe, c300 coupe 4matic, c300, c300 4matic, c43 amg cabrio 4matic, c43 amg coupe 4matic, c43 amg 4matic, c63 amg cabrio, c63s amg cabrio, c63 amg coupe, c63s amg coupe, c63 amg, c63s amg, cls450, cls450 4matic, cls53 amg 4matic, e300, e300 4matic, e450 cabrio, e450 cabrio 4matic, e450 coupe, e450 coupe 4matic, e450…
Why it matters: An impaired active brake assist May not automatically apply partial or full braking as expected, increasing the risk of a crash.
The fix: Mbusa will notify owners, and dealers will update the radar sensor control unit software, free of charge. The recall began September 13, 2019.
Airbags Vehicle recall #19V685000 · 2019 · 2,222 vehicles
What's wrong: Mercedes-benz USA, LLC. (mbusa) is recalling certain 2019-2020 a 220 and a 220 4matic, 2020 cla 250, cla 250 4 matic, glc 300 coupe 4matic, glc 300 and glc 300 4matic vehicles. The driver's side front airbag modules May not have been properly bolted down.
Why it matters: In the event of a crash necessitating deployment of the driver's front airbag, the airbag May not deploy properly, increasing the risk of injury.
The fix: Mbusa will notify owners, and dealers will inspect the driver airbag module and replace it, as necessary, free of charge. The recall began October 29, 2019.
Communication Vehicle recall #20V068000 · 2020 · 239 vehicles
What's wrong: Mercedes-benz USA, LLC. (mbusa) is recalling certain 2020 c300 cabrio, c300 cabrio 4matic, c300 coupe, c43 amg cabrio 4matic, c43 amg coupe 4matic, c63s amg cabrio, cls53 amg 4matic, e350, e350 4matic, e450 cabrio, e450 cabrio 4matic, e450 coupe, e450 coupe 4matic, e450 4matic, e53 amg cabrio 4matic, glc300 coupe 4matic, glc300, glc300 4matic, glc63 amg coupe 4matic, amg gt63 4-door 4matic, and amg gt63s 4-door…
Why it matters: An inaccurate vehicle location May delay emergency responders, increasing the risk of injury.
The fix: Mbusa will notify owners, and dealers will replace the communication module, free of charge. The recall began April 14, 2020.
Seats Vehicle recall #20V328000 · 2020 · 1,352 vehicles
What's wrong: Mercedes-benz USA, LLC. (mbusa) is recalling certain 2020 e450, amg e63s, glc300, amg glc43, amg glc63, amg gt53, and amg gt63 vehicles equipped with rear seatbacks that can be electrically unlatched. The left-rear seatback latch May not be strong enough to withstand certain loads. If cargo were to strike the left-rear seatback, the latch May fail.
Why it matters: In the event of a crash, if the left-rear seatback latch fails, it can increase the risk of injury.
The fix: Mbusa will notify owners, and dealers will replace the left-rear seatback latch, free of charge. The recall began August 17, 2020.
Engine & cooling Vehicle recall #20V364000 · 2020 · 90 vehicles
What's wrong: Mercedes-benz USA, LLC. (mbusa) is recalling certain 2020 c300, e350, and glc300 vehicles equipped with turbocharged 4-cylinder gasoline engines. The screws that retain the turbocharger oil feed and return lines May not have been properly tightened, possibly resulting in an oil leak.
Why it matters: An oil leak in the presence of an ignition source such as hot engine or exhaust components can increase the risk of a fire.
The fix: Mbusa will notify owners, and dealers will inspect the turbocharger oil lines and tighten them as necessary, free of charge. The recall began August 17, 2020.
Steering Vehicle recall #20V651000 · 2020 · 2,533 vehicles
What's wrong: Mercedes-benz USA, LLC. (mbusa) is recalling certain 2020 glc300, glc350e, glc43 amg, and glc63 amg vehicles. The power steering control unit wiring harness May have been damaged during the production process, possibly resulting in a loss of power steering assist or an electrical short-circuit.
Why it matters: A loss of power steering assist can increase the risk of a crash. Additionally, if the wiring harness short-circuits, there is an increased risk of a fire.
The fix: Mbusa will notify owners, and dealers will inspect the wiring harness, and replace it if necessary, free of charge. The recall began December 11, 2020.
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.
Body & structure Vehicle recall #21V197000 · 2021 · 15,096 vehicles
What's wrong: The front roof panel located between the windshield and the panoramic sunroof May not have been bonded correctly to the vehicle during a prior repair.
Why it matters: The adhesive bonding of the front panel might deteriorate, possibly causing the front panel to detach from the vehicle and become a road hazard, increasing the risk of a crash.
The fix: Mercedes-benz dealer will remove the bonded panel and will install a new front panel by following the detailed repair instructions and using the approved primer, cleaner and adhesive, free of charge. Owner notification letters were mailed on September 3, 2021 and October 26, 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.
Fuel system, Fuel system Vehicle recall #21V961000 · 2021 · 139 vehicles
What's wrong: During the manufacturing process, particles May have been trapped between the fuel rail and injectors, which can cause a fuel leak.
Why it matters: A fuel leak in the presence of an ignition source, such as hot engine or exhaust components, can increase the risk of a fire.
The fix: Dealers will replace the fuel rail and fuel injectors, free of charge. Owner notification letters were mailed April 22, 2022.
Backup camera Vehicle recall #22V232000 · 2022 · 126,443 vehicles
What's wrong: Please refer to mbusa's recall report for specific vehicle model details. The rearview camera May not display the rearview image due to a software error. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 111, "rear visibility."
Why it matters: An inoperable rearview camera display reduces the driver's rear view, increasing the risk of a crash.
The fix: Dealers will update the rearview camera software, free of charge. Owner notification letters were mailed July 15, 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.
Body & structure Vehicle recall #23V854000 · 2023 · 2,976 vehicles
What's wrong: Please refer to mbusa's recall report for specific vehicle details. The front roof panel located between the windshield and the panoramic sunroof May not have been bonded correctly to the vehicle during a prior repair, allowing the front panel to detach from the vehicle.
Why it matters: A detached roof panel can become a road hazard, increasing the risk of a crash.
The fix: Dealers will replace the front panel, free of charge. Owner notification letters were mailed on August 2, 2024. Owner notification letters will be mailed in phases, on, March 22,2024, and August 2, 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. 0 mention a fire, 4 injuries and 0 deaths were reported.
What owners describe
- Engine (21): the most common themes are warning light on (13), stalls / loses power (5).
- Other / unknown (15): the most common themes are noise or vibration (3), stalls / loses power (2).
- Backup camera (7): the most common themes are electrical failure (2).
- Forward collision avoidance (6): the most common themes are stalls / loses power (2).
The 2020 Mercedes-Benz Glc 300 has 69 owner complaints, ranking #2 of 9 Glc 300 model years for complaints (about average; the typical year has 47). Complaints peaked in 2025 (20 filed that year). The typical problem showed up when the car was about 4 years old, at a median of 21,250 miles. Neighboring years: 2019 (47 complaints, 12 recalls), 2021 (67 complaints, 9 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 | 24 | Premium |
Want the full repair deets? Get the factory manual.
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FAQ
Does the 2020 Mercedes-Benz Glc 300 have any recalls?
Yes. NHTSA lists 16 vehicle recalls for the 2020 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 2020 Mercedes-Benz Glc 300 problems?
Owners have filed 69 complaints with NHTSA. The most-reported areas are engine (21), other / unknown (15), backup camera (7).
What gas mileage does the 2020 Mercedes-Benz Glc 300 get?
EPA ratings run up to 24 mpg combined (2.0 L, Automatic 9-spd), across 1 engine and transmission combos.
Where can I get a 2020 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.