2018 Mercedes-Benz Glc300 Reliability Data: Problems & Recalls
Caution The 2018 Mercedes-Benz Glc300 has a complaint index of 22, ranking 8th worst out of 10 model years, with a Caution verdict capped due to 10 recall campaigns requiring a dealer visit. Engine complaints lead at 33% of the 87 total complaints filed.
Based on NHTSA complaints per model-year, not a reliability rating. Methodology
YearToAvoid Scorecard
- Complaint Index
- 22/100
- #8 of 10 Glc300 years
- Verdict
- Caution
- vs. other years of this model
- Complaints
- 87
- unique NHTSA reports
- Recalls
- 12
- distinct NHTSA campaigns
- Crashes
- 4
- reported in complaints
- Fires
- 1
- Injuries
- 2
- Top issue
- Engine
- NHTSA overall rating
- Not rated
- EPA combined MPG
- 24
- 22 city / 28 hwy
- Injuries / deaths
- 2 / 0
Top 2018 Mercedes-Benz Glc300 problems
Share of this year’s NHTSA complaints by component group. Groups with 15+ complaints have their own page.
- Engine29 (33%)
- Other20 (23%)
- Electrical System14 (16%)
- Structure & Body10 (11%)
- Seat Belts8 (9%)
- Transmission & Powertrain8 (9%)
- Fuel System7 (8%)
- Airbags6 (7%)
- Brakes5 (6%)
- Collision Avoidance & Cameras4 (5%)
A complaint can list more than one component, so shares add up to more than 100%. Shares are % of complaints.
What owners report
- Owners report brakes squealing loudly at low speeds, especially in cold or snowy weather, sometimes persisting after dealer visits.
- Some drivers describe the vehicle unexpectedly lurching or accelerating while parking, in one case hitting a wall and deploying airbags.
- One owner reported a run-flat tire puncturing at highway speed and later catching fire after the vehicle was pulled over.
- A transmission failure was described as a loud bang followed by a near-total loss of power and steering response in an intersection.
- Electrical issues include doors locking automatically with keys left inside or outside the vehicle.
- One driver reported the engine shutting off unexpectedly at a stoplight while in eco mode with auto stop engaged.
2018 Mercedes-Benz Glc300 recalls
12 NHTSA recall campaigns list this model year.
- NHTSA 23V854000Dec 15, 2023Structure & Body2,976 vehicles
Structure:body:roof and pillars
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2014-2020 C-Class, CLA, GLA, S-Class, GLC, and GLE vehicles. 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.
Risk: A detached roof panel can become a road hazard, increasing the risk of a crash.
Remedy: 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. Owners may contact MBUSA customer service at 1-800-367-6372. This recall is an expansion of NHTSA recall number 21V-197.
- NHTSA 22V365000May 20, 2022Electrical System242,722 vehiclesOver-the-air fix
Electrical system:software
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2017-2022 CLA-Class, GLA-Class, GLE-Class, GLS-Class, SLC-Class, A-Class, AMG GT-Class, C-Class, E-Class, S-Class, SL-Class, GLC-Class, CLS-Class, GLB-Class, and G-Class vehicles. 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.
Risk: 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.
Remedy: 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. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA's numbers are for this recall is 2022060005 and 2023110006.
- NHTSA 21V197000Mar 19, 2021Structure & Body15,096 vehicles
Structure:body:roof and pillars
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2017-2020 C300 Coupe, C43 Coupe AMG, C43 AMG, 2015-2020 C300, GLA250, 2016-2018 C350e, CLA45 Coupe AMG, 2015 C400, S65 AMG, 2015-2019 C63 AMG, 2016 C450, 2015-2016 GLA45 AMG, S600, 2016-2020 GLC300, 2017-2019 GLC43 AMG, GLE43 Coupe AMG, 2014-2019 CLA250 Coupe, 2014-2015 CLA45 AMG, 2018 GLC63 AMG, 2014-2017 S550, 2018-2020 S450, 2016-2019 GLE63 Coupe AMG, 2016 GLE450 Coupe, 2014-2020 S63 AMG, 2018-2019 S560, and 2019 GLC350e vehicles equipped with a panoramic sunroof. 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.
Risk: 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.
Remedy: 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. Owners may contact MBUSA customer service at 1-800-367-6372.
2018 Mercedes-Benz Glc300 fuel economy and fuel cost
- City
- 22 MPG
- Highway
- 28 MPG
- Combined
- 24 MPG
- Annual fuel cost (EPA)
- $3,300
- 15,000 mi/yr
- Fuel
- Premium
- Current regular gas
- $4.32/gal
- national avg.
EPA figures; median across configurations of this model year. Estimate your own cost with the fuel cost calculator.
2018 compared with other Glc300 years
Frequently asked questions
- Is the 2018 Mercedes-Benz Glc300 reliable?
- Based on NHTSA owner complaints and recalls, the 2018 Glc300 carries a Caution verdict, ranking 8th worst among 10 model years with a complaint index of 22. Its verdict is capped because it has 10 recall campaigns requiring a dealer visit.
- What is the top problem area for the 2018 Glc300?
- Engine complaints make up 33% of all reported issues, the largest share of any problem area, with a median mileage at failure of 6,000 miles.
- Does the 2018 Glc300 have recalls?
- Yes, NHTSA lists 12 recall campaigns for the 2018 model year, covering areas including structure and body, electrical systems, airbags, and seat belts.
- How does the 2018 Glc300 compare to other years?
- The 2018 model year has a complaint index of 22, better than the 2016 (100), 2017 (44), 2020 (67), 2022 (78), and 2023 (89) model years, though it still carries a Caution verdict due to its recall count.
- What is the fuel economy of the 2018 Glc300?
- EPA rates the 2018 Glc300 at 24 mpg combined, with 22 mpg city and 28 mpg highway, and an estimated annual fuel cost of $3,300.