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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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id11000623
Published by NHTSA2024-06-01
Manufacturer's numberLI01.20-P-076894
Manufacturer's date2024-05-14
Campaign id or software versionLI01.20-P-076894
NHTSA componentENGINE

NHTSA's 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 year 2015-2018 vehicles. Model year 2019 (Except model 172 and hybrid variants) Perform software update for N3/10 Engine control unit. Replacement of intake line assembly is not required. This LI is in relation to NCU dated 8/31/2023 "Emission Extended Warranty – Intake Line Assembly".

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Engine

Trouble codes named

P052E

Vehicles listed
MERCEDES-BENZ C 3002017 to 2018
MERCEDES-BENZ C 350 E2018
MERCEDES-BENZ C3002015 to 2016
MERCEDES-BENZ C350E2016 to 2017
MERCEDES-BENZ E 3002018 to 2019
MERCEDES-BENZ E3002017
MERCEDES-BENZ GLC 3002018 to 2019
MERCEDES-BENZ GLC 350 E2018
MERCEDES-BENZ GLC 350 E2020 to 2021
MERCEDES-BENZ GLC3002016
MERCEDES-BENZ SLC 3002018 to 2020
MERCEDES-BENZ SLC3002017
MERCEDES-BENZ SLK3002016

Listing a model year does not mean every vehicle of it is concerned: the document says which.