Mercedes-Benz C 300 2015–2021 — technical service bulletin
Bulletin LI01.20-P-076894 · NHTSA communication 11000623 · issued May 14, 2024
Technical service bulletin
communication type
Engine
component
2015–2021
model years
21
vehicle entries
Official summary
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 Model year 2015-2018 (non-hybrid), and ALL model year 172 and hybrid variants Performed guided test for fault code P052E71. Replace intake line assembly if necessary per results of the guided test. This LI will be updated once the software solution is available for hybrid and model
Vehicles covered
- 2017 Mercedes-Benz C 300
- 2018 Mercedes-Benz C 300
- 2015 Mercedes-Benz C300
- 2016 Mercedes-Benz C300
- 2018 Mercedes-Benz C 350 E
- 2016 Mercedes-Benz C350E
- 2017 Mercedes-Benz C350E
- 2018 Mercedes-Benz E 300
- 2019 Mercedes-Benz E 300
- 2017 Mercedes-Benz E300
- 2018 Mercedes-Benz GLC 300
- 2019 Mercedes-Benz GLC 300
- 2016 Mercedes-Benz GLC300
- 2018 Mercedes-Benz GLC 350 E
- 2020 Mercedes-Benz GLC 350 E
- 2021 Mercedes-Benz GLC 350 E
- 2018 Mercedes-Benz SLC 300
- 2019 Mercedes-Benz SLC 300
- 2020 Mercedes-Benz SLC 300
- 2017 Mercedes-Benz SLC300
- 2016 Mercedes-Benz SLK300
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.