C350E on Mercedes-Benz vehicles
C350E is named on 27 Mercedes-Benz model years (2016–2025): 61 manufacturer filings and 1 owner report in NHTSA’s files, across C-Class, GLC-Class, SLC-Class, SLK-Class, E-Class.
Which Mercedes-Benz model years name C350E
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2017 Mercedes-Benz C-Class | Engine | 4 | 1 |
| 2019 Mercedes-Benz GLC-Class | Engine | 4 | — |
| 2018 Mercedes-Benz C-Class | Engine | 4 | — |
| 2018 Mercedes-Benz GLC-Class | Engine | 4 | — |
| 2016 Mercedes-Benz C-Class | Engine | 4 | — |
| 2021 Mercedes-Benz GLC-Class | Engine | 3 | — |
| 2020 Mercedes-Benz C-Class | Engine | 3 | — |
| 2020 Mercedes-Benz GLC-Class | Engine | 3 | — |
| 2020 Mercedes-Benz SLC-Class | Engine | 3 | — |
| 2019 Mercedes-Benz C-Class | Engine | 3 | — |
| 2019 Mercedes-Benz SLC-Class | Engine | 3 | — |
| 2018 Mercedes-Benz SLC-Class | Engine | 3 | — |
| 2017 Mercedes-Benz SLC-Class | Engine | 3 | — |
| 2016 Mercedes-Benz SLK-Class | Engine | 3 | — |
| 2025 Mercedes-Benz E-Class | Engine | 2 | — |
| 2024 Mercedes-Benz E-Class | Engine | 1 | — |
| 2023 Mercedes-Benz E-Class | Engine | 1 | — |
| 2022 Mercedes-Benz E-Class | Engine | 1 | — |
| 2021 Mercedes-Benz E-Class | Engine | 1 | — |
| 2020 Mercedes-Benz E-Class | Engine | 1 | — |
| 2019 Mercedes-Benz E-Class | Engine | 1 | — |
| 2018 Mercedes-Benz E-Class | Engine | 1 | — |
| 2017 Mercedes-Benz E-Class | Engine | 1 | — |
| 2017 Mercedes-Benz GLC-Class | Engine | 1 | — |
| 2016 Mercedes-Benz E-Class | Engine | 1 | — |
| 2016 Mercedes-Benz GLC-Class | Engine | 1 | — |
| 2016 Mercedes-Benz SLC-Class | Engine | 1 | — |
A model year is listed because the code is named in its own record — a bulletin filed against it, or an owner’s complaint about it — not because every one of these vehicles sets it. Counts are documents in NHTSA’s files, not failure rates.
Mercedes-Benz filings that name C350E
Source: NHTSA manufacturer communicationsBulletins and campaigns Mercedes-Benz filed with NHTSA whose summary names C350E. Quote the document number at the service desk — it is a diagnosis the maker has already written down.
- LI01.20-P-076894 Service bulletin2025-01-17 · Engine
- Complaint Check engine light illuminated Fault code stored in N3/10 control unit- P052E71 – Positive Crankcase Ventilation Regulator Valve Performance: The valve for crankcase ventilation has a malfunction Cause The partial-load ventilation valve (a part of the intake line assembly) may not work as intended. Remedy **Important** Replacement of the engine wiring harness or control unit is not neede
- LI01.20-P-076894 Service bulletin2025-04-15 · Engine
- Complaint Check engine light illuminated Fault code stored in N3/10 control unit- P052E71 – Positive Crankcase Ventilation Regulator Valve Performance: The valve for crankcase ventilation has a malfunction Cause The partial-load ventilation valve (a part of the intake line assembly) may not work as intended. Remedy **Important** Replacement of the engine wiring harness or control unit is not neede
- LI01.20-P-076894 Service bulletin2025-05-15 · Engine
- Complaint Check engine light illuminated Fault code stored in N3/10 control unit- P052E71 – Positive Crankcase Ventilation Regulator Valve Performance: The valve for crankcase ventilation has a malfunction Cause The partial-load ventilation valve (a part of the intake line assembly) may not work as intended. Remedy **Important** Replacement of the engine wiring harness or control unit is not neede
What C350E means
Source: SAE J2012 / OBD-IIC350E is a manufacturer-specific code: the second character is a 3, which under the OBD-II standard hands the definition to whoever built the vehicle. The same code can mean one thing on a Ford and something unrelated on a Hyundai. Any site that prints a single definition for it is guessing.
A stored code names the test that failed, never the part that caused it. The record above is what Mercedes-Benz and its owners have filed about it; the code’s page across every make has the whole file.
Common questions
Source: NHTSA files and the OBD-II standardIs C350E a known problem on Mercedes-Benz vehicles?
It is a documented one: NHTSA's files hold 61 manufacturer filings and 1 owner report naming C350E on 27 Mercedes-Benz model years (2016–2025). Whether it is a problem on one particular car is a diagnosis, not a count — but a bulletin that names the code on your model year is the place to start.
Which Mercedes-Benz models does C350E appear on most?
2017 C-Class (5 documents), 2018 C-Class (4 documents), 2016 C-Class (4 documents).
Does C350E on a Mercedes-Benz mean it is recalled?
No. Recalls are filed by campaign and matched by VIN; no recall is triggered by a scan tool. Check the VIN at nhtsa.gov/recalls, or open the model year's page here for the campaigns filed against it.