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NHTSA-Verified · Common Problems

2016 Mercedes Benz Glc Class
Common Problems

Ranked from 79 federal NHTSA complaints. Every problem links to the complaint IDs behind it.

1
Safety
4
High severity
3
Medium
1
Low
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) Valve Failure

    26complaints
    High severityFuel system

    The PCV valve repeatedly fails, causing engine performance issues and requiring expensive repairs.

  2. 2

    Brake squeal and screeching noise

    19complaints
    Medium severityBrakes

    The brakes produce a loud, piercing screeching sound, especially when backing up or braking.

    $250–$700est. brake pads + rotors (per axle) · 1–2.5 hrs labor
    Get local quotes
  3. 3

    Engine Rough Idling and Shaking

    13complaints
    High severityEngine

    The engine experiences rough idling and violent shaking, often due to internal mechanical failures such as cracked pistons.

  4. 4

    Sunroof Malfunction

    9complaints
    High severityOther

    The sunroof does not operate correctly, making it difficult to open or close and potentially posing a safety hazard.

  5. 5

    Steering Issues

    7complaints
    Medium severitySteering

    The steering wheel locks up or malfunctions, preventing proper control of the vehicle and posing a safety risk.

  6. 6

    Airbag Deployment Failure

    5complaints
    Safety riskElectrical

    The airbags fail to deploy during a collision, increasing the risk of injury.

  7. 7

    Delayed recall repair availability

    5complaints
    Low severityOther

    Recall repairs for various issues have not been available within a reasonable time frame.

  8. 8

    Fuel System Leak

    3complaints
    Medium severityFuel system

    Leaking fuel lines or pumps cause a strong fuel smell and potential fire hazard.

  9. 9

    Unexplained Acceleration

    2complaints
    High severityOther

    The vehicle accelerates unexpectedly without warning, posing a significant safety risk.

Other years & sources

2017 Mercedes Benz Glc ClassAll 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.