# Service bulletin LI01.20\-P\-076894

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 10243308
- Published by NHTSA: 2023\-10\-02
- Manufacturer's number: LI01.20\-P\-076894
- Manufacturer's date: 2023\-09\-12
- NHTSA component: ENGINE AND ENGINE COOLING; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CRANKCASE \(PCV\)

## NHTSA's summary

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 The partial\-load ventilation valve \(a part of the intake line assembly\) may not work as intended Performed guided test for fault code P052E71. Replace intake line assembly if necessary per results of the guided test. Do not perform software update of N3/10 Engine control unit at this time. This LI will be updated once the software solution is available. This LI is in relation to NCU dated 8/31/2023 "Emission Extended Warranty – Intake Line Assembly".

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2023/MC-10243308-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2023/MC-10243308-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Engine, Exhaust and emissions, Crankcase ventilation \(PCV\)

## Trouble codes named

P052E

## Vehicles listed

- 2018 MERCEDES BENZ C 300 4MATIC
- 2017 to 2018 MERCEDES\-BENZ C 300
- 2018 MERCEDES\-BENZ C 350 E
- 2015 to 2016 MERCEDES\-BENZ C300
- 2016 to 2017 MERCEDES\-BENZ C350E
- 2018 MERCEDES\-BENZ E 300
- 2014 to 2016 MERCEDES\-BENZ E250
- 2016 to 2017 MERCEDES\-BENZ E300
- 2018 to 2019 MERCEDES\-BENZ GLC 300
- 2018 MERCEDES\-BENZ GLC 350 E
- 2016 to 2017 MERCEDES\-BENZ GLC300
- 2019 MERCEDES\-BENZ GLC350E
- 2013 to 2015 MERCEDES\-BENZ GLK250
- 2018 to 2019 MERCEDES\-BENZ SLC 300
- 2017 MERCEDES\-BENZ SLC300

JSON: [/v1/bulletins/10243308](/v1/bulletins/10243308)

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