2015 Mercedes-Benz C300 Structure Problems
Owners have filed 60 complaints with NHTSA about structure problems on the 2015 Mercedes-Benz C300, 16% of all complaints for this model year. Half of the reports with a mileage happened before 62,612 miles. The words owners use most often: “rear subframe” (15% of reports).
- 60structure complaints
- 62,612median miles at failure
- 1mention a crash
- 0mention an injury
- 2related recalls
- 77%of reports with a speed happened at 50+ mph
What owners describe
Phrases that appear unusually often in these complaints compared with complaints about other cars.
- Rear subframe: mentioned in 9 of 60 complaints (15%)
- Panoramic sunroof: mentioned in 9 of 60 complaints (15%)
- Roof panel: mentioned in 8 of 60 complaints (13%)
- Structure included: mentioned in 7 of 60 complaints (12%)
At what mileage do structure problems happen?
Based on 39 complaints that reported the odometer reading.
How serious are the reports?
Of 60 complaints, 1 mention a crash.
Mercedes-Benz C300 structure complaints by model year
| Model year | Structure complaints | Share of that year | Median miles |
|---|---|---|---|
| 2026 C300 | 1 | 50% | 1,729 |
| 2025 C300 | 1 | 25% | — |
| 2023 C300 | 1 | 5% | — |
| 2022 C300 | 1 | 4% | 6,000 |
| 2020 C300 | 4 | 12% | 28,722 |
| 2019 C300 | 7 | 10% | 48,000 |
| 2018 C300 | 14 | 14% | 47,000 |
| 2017 C300 | 24 | 11% | 40,000 |
| 2016 C300 | 27 | 9% | 45,000 |
| 2015 C300 | 60 | 16% | 62,612 |
| 2014 C300 | 9 | 10% | 51,500 |
| 2013 C300 | 58 | 22% | 80,000 |
| 2012 C300 | 54 | 20% | 110,000 |
| 2011 C300 | 49 | 10% | 105,000 |
| 2010 C300 | 34 | 8% | 63,000 |
| 2009 C300 | 27 | 5% | 92,100 |
| 2008 C300 | 9 | 1% | 66,000 |
When owners reported it
Related recalls (2)
Structure:body:roof and pillars
Problem: 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.
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. Owners may contact MBUSA customer service at 1-800-367-6372. This recall is an expansion of NHTSA recall number 21V-197.
Structure:body:roof and pillars
Problem: 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.
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. Owners may contact MBUSA customer service at 1-800-367-6372.
What owners report
Short excerpts of recent complaints, with personal details removed. Full reports are on NHTSA.gov.
The contact owns a 2015 Mercedes-Benz C300. The contact stated that while driving at an undisclosed speed, there was an abnormal sound coming from the vehicle and the vehicle became difficult to maneuver. The failure had occurred on several occasions. The vehicle was taken to an independent…
The contact owns a 2015 Mercedes-Benz C300. While the contactâs son was driving approximately 20 MPH, the vehicle veered to the left and into the next lane when the brake pedal was depressed. The vehicle was cautiously driven back to the residence and parked. The vehicle was later towed to the…
The contact owns a 2015 Mercedes-Benz C300. The contact stated that while driving at various speeds and depressing the brake pedal, the vehicle fishtailed on several occasions. The vehicle was taken to an independent mechanic, where it was raised on a lift, and the mechanic discovered that the rear…
Frequently asked questions
Do all 2015 Mercedes-Benz C300s have structure problems?
No. NHTSA has 60 owner complaints about structure for the 2015 Mercedes-Benz C300 (16% of the 381 complaints for this model year). Complaint data shows that the problem is reported, not how many of all cars sold are affected.
Was there a recall on the 2015 Mercedes-Benz C300 structure?
Yes: 2 safety recalls list structure. Check your VIN on NHTSA.gov to see whether the fix was done on your car.
At what mileage do structure problems start?
The median reported mileage is 62,612 miles: half of the reports with a mileage came before that.
What do owners say about structure problems on the 2015 Mercedes-Benz C300?
The most frequent phrase is “rear subframe”, in 9 of 60 complaints, followed by “panoramic sunroof” (9).
Other 2015 Mercedes-Benz C300 problems
See all 2015 Mercedes-Benz C300 problems or structure problems across all C300 years.