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Service bulletin NCU-2020080005

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 id10179973
Published by NHTSA2020-09-21
Manufacturer's numberNCU-2020080005
Manufacturer's date2020-08-14
NHTSA componentENGINE; ELECTRICAL SYSTEM:SOFTWARE

NHTSA's summary

Mercedes-Benz AG ("MBAG"), the manufacturer of Mercedes-Benz, has determined that on certain MY19-20 C-Class, GLC-Class, and AMG GT (205, 253, and 290 platform) vehicles, the software for the AMG drive unit control unit does not correspond to the current series production configuration. As a result, noise may occur from the engine mounts. An authorized Mercedes-Benz dealer will update the software as necessary.

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

Electrical system, Engine, Software

Vehicles listed
MERCEDES-BENZ AMG C432019
MERCEDES-BENZ AMG GLC432019 to 2020
MERCEDES-BENZ AMG GLC632019
MERCEDES-BENZ AMG GLC63S2019
MERCEDES-BENZ AMG GT2019, 2020
MERCEDES-BENZ AMG GT 632019 (the catalog's model; the bulletin names a series or trim of it)
MERCEDES-BENZ AMG GT532019, 2020 (the catalog's model; the bulletin names a series or trim of it)
MERCEDES-BENZ AMG GT632019, 2020 (the catalog's model; the bulletin names a series or trim of it)
MERCEDES-BENZ AMG GT63S2019, 2020 (the catalog's model; the bulletin names a series or trim of it)
MERCEDES-BENZ C 3002019
MERCEDES-BENZ GLC 3002019 to 2020
MERCEDES-BENZ GLC350E2019

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

Recalls for the same vehicles and component
22V3650002022-05-20. COMMUNICATION: AUTO CRASH NOTIFICATION; ELECTRICAL SYSTEM:SOFTWARE
21V0580002021-02-05. ELECTRICAL SYSTEM:SOFTWARE; COMMUNICATION: AUTO CRASH NOTIFICATION
20V3950002020-07-06. ELECTRONIC STABILITY CONTROL (ESC); ELECTRICAL SYSTEM:SOFTWARE

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
OTA-242402012024-03-04. Service bulletin. Mercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz vehicles, has determined that on certain MY20-23 A-Class, C-Class, CLA, CLS, E-Class, GLA, GLB, GLC, GLE, GLS, AMG GT, S-Class (177, 205, 118, 257, 213, 238, 247, 253, 167, 290, 217, 222 platform) vehicles, the communication module system software does not correspond with the latest series production configuration. The communication module will receive an OTA update to improve the system stability and allow for better accessibility of Mercedes me services. MBUSA will conduct an OTA service campaign. Remote software updates are automatically downloaded and installed in the customer’s vehicle free of charge and do not require a dealer visit. All customers have been mailed a letter informing them of this OTA software update.
NCU-HU SW Update2023-09-01. Service bulletin. Mercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz vehicles, has determined that on certain MY 2018-2023 C-Class, EQE, EQE SUV, EQS, EQS SUV, GLC, GLE and S-Class (206, 295, 294, 297, 296, 254, 167 and 223 platform) vehicles, the communication module software does not correspond with the latest series production configuration. The update is free of charge and will be carried out in the background. The installation will eliminate software errors for a better entertainment experience. The update will show after the ignition has been cycled. MBUSA will conduct an OTA service campaign. A workshop visit for the customer is not required since remote software updates are automatically downloaded and installed in the customer’s vehicle. The OTA may be validated as successful on the customer’s Mercedes Me connect app under “Over-the-Air Vehicle Updates” as “Update for the communication module”. If the OTA is successful it will show a green “installed” and date of installation in the Over-the-Air update section.
LI46.15-P-0633532022-08-04. Service bulletin. Complaint Height adjustment of electric steering column adjustment jammed in the top/bottom adjustment position (e.g. with Easy Entry function). Cause Height adjustment moves to the top/bottom limit stop and jams. 1. Steering column height adjustment transmission 2. Seat control unit software Remedy There are 2 repair procedures to follow depending on vehicle (differentiated according to model and vehicle manufacturing date) 1. Replace repair kit for steering column height adjustment 2. Perform software update of driver's seat control unit
LI54.30-P-0704822020-07-27. Service bulletin. The check engine indicator light in the instrument cluster may be illuminated with one of the following fault codes: P261029, P02FF85, or P02FF02 stored in the engine control unit (N3/10). The time in instrument cluster is implausible due to an internal reset. If no other complaints exist then check for and perform any available software updates for the following control units: - Motor electronics (N3/10) - Powertrain control unit (N127) - Instrument cluster (A1) If all three control units have the latest software installed and the complaint continues to occur then proceed with replacement of the instrument cluster (A1) Should the complaint re-occur after the instrument cluster has been replaced then open a PTSS case with the following information: - Control units logs for the ME, PTCU, and IC - Initial quick test
SC-20191100032019-12-23. Service bulletin. Update sound system control unit software
LI83 30-P-0690742019-04-15. Service bulletin. No difference between blower setting 5 and 6 on air conditioning system