P052E · Manufacturer communications

MERCEDES-BENZ · 2025-05-15

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 needed if oil is found at the electrical connection of the crankcase ventilation valve or control unit. Replacement is only allowed if other symptoms or faults are present. Perform either remedy A or remedy B depending on the model Remedy A: SLK/SLC300, C350e hybrid, and GLC350e hybrid Perform guided test for fault code P052E71. Replace intake line assembly if necessary per results of the guided test.…

MERCEDES-BENZ · 2025-04-15

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 needed if oil is found at the electrical connection of the crankcase ventilation valve or control unit. Replacement is only allowed if other symptoms or faults are present. Perform either remedy A or remedy B depending on the model Remedy A: SLK/SLC300, C350e hybrid, and GLC350e hybrid Perform guided test for fault code P052E71. Replace intake line assembly if necessary per results of the guided test.…

MERCEDES-BENZ · 2025-01-17

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 needed if oil is found at the electrical connection of the crankcase ventilation valve or control unit. Replacement is only allowed if other symptoms or faults are present. ALL model year SLK/SLC300, C350e hybrid, and GLC350e hybrid Perform guided test for fault code P052E71. Replace intake line assembly if necessary per results of the guided test. Software is not planned for models SLK/SLC300, C350e,…

MERCEDES-BENZ · 2024-07-09

This NCU replaces the prior NCUs issued on August 25, 2023, August 31, 2023 respectively and, contains clarification on parts ordering. In our continuing efforts to assure the proper performance of Mercedes-Benz products and to enhance the satisfaction of our customers, Mercedes-Benz USA, LLC (“MBUSA”) is extending the warranty coverage on the intake line assembly in certain Model Year (“MY”) vehicles listed below from the original New Vehicle Limited Warranty of 4 years/50,000 miles to 15 years/150,000 miles (whichever occurs first) due to the following condition: •Under certain circumstances, the partial-load ventilation valve (a part of the intake line assembly) may not work as intended,resulting in the illumination of the check engine Malfunction Indicator Lamp (‘MIL’). A faulty…

MERCEDES-BENZ · 2024-07-08

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 2018 C300 | Model year 2016-2018 GLC300 and E300 | ALL model year SLK/SLC300 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 model year 2018 C300 and 2016-2018 GLC300 and E300 vehicles. Model year 2015-2017 C300 | Model year 2019 GLC300 and E300 Perform software update for N3/10 Engine control unit.…

MERCEDES-BENZ · 2024-05-14

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…

MERCEDES-BENZ · 2024-04-15

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. Model year 2015-2018 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 model year 2015-2018 vehicles. Model year 2019 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".

MERCEDES-BENZ · 2023-09-12

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".

MERCEDES-BENZ · 2023-08-24

In our continuing efforts to assure the proper performance of Mercedes-Benz products and to enhance the satisfaction of our customers, Mercedes-Benz USA, LLC (“MBUSA”) is extending the warranty coverage on the intake line assembly in certain Model Year (“MY”) vehicles listed below from the original New Vehicle Limited Warranty of 4 years/50,000 miles to 15 years/150,000 miles (whichever occurs first) due to the following condition: •Under certain circumstances, the partial-load ventilation valve (a part of the intake line assembly) may not work as intended,resulting in the illumination of the check engine Malfunction Indicator Lamp (‘MIL’). A faulty partial-load ventilation valvemight also increase exhaust gas emission. Please be advised that all repairs being claimed under this extended…

AUDI · 2021-05-06

This bulletin contains repair instrructions for when there are noises in the engine compartment with DTC P052E00.

AUDI · 2020-08-26

This bulletin contains repair instrructions for when there are noises in the engine compartment with DTC P052E00.

AUDI · 2020-07-21

This bulletin contains repair instructions for when DTC P052E00 is stored with noise coming from the engine compartment.

AUDI · 2020-07-21

This bulletin contains repair instructions for when there are noises in the engine compartment with DTC P052E00.

MERCEDES-BENZ · 2015-03-30

Engine diagnosis warning lamp is active, DTC P052E71

MERCEDES-BENZ · 2014-06-20

Engine diagnosis warning lamp is active, DTC P052E71

MERCEDES-BENZ · 2014-03-21

Engine diagnosis warning lamp active - check engine light (CEL) on. The fault code P052E71 is logged in the fault memory of the engine control unit.

MERCEDES-BENZ · 2014-03-08

Check Engine Light illuninated in instrument cluster DTC P052E71 stored in ME control unit