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NHTSA-Verified · Common Problems

2017 Mercedes Benz Glc Class Coupe
Common Problems

Ranked from 44 federal NHTSA complaints. Every problem links to the complaint IDs behind it.

1
Safety
4
High severity
4
Medium
1 problem on this vehicle involve a crash, fire, or injury risk. If you are experiencing one, stop driving and have it inspected.

9 Common Problems

Ordered by how often owners reported each one to NHTSA. The bar shows how common a problem is relative to the most-reported on this vehicle. Expand any problem to see the federal complaint IDs.

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  1. 1

    Positive Crankcase Ventilation (PCV) System Failure

    16complaints
    High severityFuel system

    The PCV system fails, causing the check engine light to illuminate and potentially leading to engine stalling or seizing.

  2. 2

    Panoramic Sunroof Failure

    7complaints
    High severityOther

    The panoramic sunroof has failed, causing sections to detach and dislodge from the vehicle.

  3. 3

    Seat Belt Retractor Malfunction

    6complaints
    Medium severityOther

    The seat belt retractor malfunctions, failing to extend or retract properly, posing a safety risk during sudden stops or collisions.

  4. 4

    Recall Campaign for Electrical and Engine Issues

    5complaints
    Medium severityElectrical

    Multiple reports of electrical and engine issues under NHTSA campaign 17V114000, with unavailable parts and delayed repair times.

  5. 5

    Airbag Malfunction

    4complaints
    Safety riskElectrical

    The airbags fail to deploy correctly, indicated by error messages such as 'Driver’s Air Bag Malfunction - Service Required'.

  6. 6

    Engine Failure at High Mileage

    2complaints
    High severityEngine

    The engine has failed catastrophically at around 60,000 miles, leading to the need for engine replacement.

    $4,000–$8,000est. engine replacement · 12–20 hrs labor
    Get local quotes
  7. 7

    Fuel Line Leak

    2complaints
    Medium severityFuel system

    The fuel line leaks near the driver seat, filling the cabin with fuel vapors.

    $300–$1,200est. fuel line/tank repair · 2–6 hrs labor
    Get local quotes
  8. 8

    Steering Column Malfunction

    2complaints
    Medium severitySteering

    The steering column has stopped moving up and down, leading to temporary loss of steering control.

    $200–$1,500est. power-steering / eps repair · 1–6 hrs labor
    Get local quotes
  9. 9

    Sunroof Explosion

    2complaints
    High severityOther

    The panoramic sunroof has exploded outward while driving at highway speeds, posing a safety hazard.

Other years & sources

2018 Mercedes Benz Glc Class CoupeAll NHTSA complaints for this vehicle →

Data source: U.S. National Highway Traffic Safety Administration (NHTSA) owner complaints and recalls. Problems are clustered and ranked from the complaint record; occurrence counts reflect corroborating complaints, not total incidence. Vehicle image is illustrative. Repair-cost figures are typical U.S. independent-shop ranges (parts + labor) for the class of repair shown — actual quotes vary by region, engine, and diagnosis; always confirm with a local shop.