2016 Mercedes Benz C Class
Common Problems
Ranked from 141 federal NHTSA complaints. Every problem links to the complaint IDs behind it.
15 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.
- 1
Positive Crankcase Ventilation (PCV) Valve Malfunction
45complaintsHigh severityEngineThe PCV valve malfunctions leading to engine light activation and potential engine damage.
- 2
Sunroof Malfunction
40complaintsSafety riskOtherThe sunroof malfunctions, including sticking, failing to close properly, and leaking water into the cabin.
- 3
Check Engine Light Due to Positive Crankcase Ventilation Valve Failure
35complaintsSafety riskEngineThe Positive Crankcase Ventilation (PCV) valve is failing, causing the check engine light to illuminate with code P052E.
$100–$250est. professional diagnosis · 1–2 hrs laborGet local quotes - 4
Power Steering Failure
20complaintsHigh severitySteeringThe power steering system fails, making the steering wheel extremely difficult to turn and increasing the risk of accidents.
$200–$1,500est. power-steering / eps repair · 1–6 hrs laborGet local quotes - 5
Fuel Line Leaks and Strong Fuel Odor
10complaintsHigh severityFuel systemFuel line leaks and strong fuel odors inside the cabin are common, potentially leading to safety concerns such as fire risks.
$300–$1,200est. fuel line/tank repair · 2–6 hrs laborGet local quotes - 6
Airbag recall issues
8complaintsMedium severityElectricalIssues with Takata airbags, including recalls and unavailability of replacement parts.
- 7
Power steering malfunction
8complaintsSafety riskSteeringThe power steering system malfunctions, making it difficult to steer the vehicle.
$200–$1,500est. power-steering / eps repair · 1–6 hrs laborGet local quotes - 8
Structural Issues with Roof Panels
5complaintsMedium severityOtherRoof panels between the windshield and panoramic sunroof often detach, leading to potential safety hazards.
- 9
Brake system malfunction leading to unexpected forward movement
2complaintsHigh severityBrakesThe car unexpectedly moves forward when the brakes are engaged, particularly when stopped at a red light.
$150–$1,000est. brake system diagnosis + repair · 1–4 hrs laborGet local quotes - 10
Electrical system issues leading to recall repair delays
2complaintsLow severityElectricalIssues with the electrical system, including recalls related to cooling and electrical components, causing delays in repair.
- 11
Engine stall at idle due to stop-start system failure
2complaintsMedium severityEngineThe engine stalls or hesitates when idling, especially at traffic lights or in stop-and-go traffic.
$150–$900est. stop-start system diagnosis · 1–4 hrs laborGet local quotes - 12
Fuel Odor Inside Vehicle
2complaintsMedium severityFuel systemVehicle emits a strong fuel odor, possibly indicating a fuel leak.
- 13
Fuel System Leaks
2complaintsHigh severityFuel systemFuel system leaks, particularly in the high-pressure pump and fuel hoses, lead to strong gasoline odors and potential fire hazards.
- 14
Transmission Shifting Issues
2complaintsMedium severityTransmissionTransmission shifting into neutral unexpectedly poses a risk of losing control of the vehicle.
$200–$2,500est. drivetrain diagnosis + repair · 1–8 hrs laborGet local quotes - 15
Unexplained Vehicle Movement
2complaintsHigh severityOtherThe vehicle unexpectedly moves forward without driver input, potentially leading to accidents.
Other years & sources
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.