Mercedes-Benz

High-Voltage Battery May Shutdown Unexpectedly – 2024-2025 Mercedes-Benz EQE & EQS

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May 28, 2024 NHTSA CAMPAIGN NUMBER: 24V372000

High-Voltage Battery May Shutdown Unexpectedly

A sudden loss of drive power increases the risk of a crash.

 

NHTSA Campaign Number: 24V372

Manufacturer Mercedes-BenzeBay logo USA, LLC

Components ELECTRICAL SYSTEM

Potential Number of Units Affected 14,912

 

Summary

Mercedes-BenzeBay logo USA, LLC (MBUSA) is recalling certain 2024 EQE 350 4MATIC, EQE 350+, EQE 500 4MATIC, EQS 450 4MATIC, EQS 450+, EQS 580 4MATIC, AMG EQE 53 4MATIC, AMG EQS 53 4MATIC, 2023-2025 EQE SUV 350 4MATIC, EQE SUV 350+, EQE SUV 500 4MATIC, EQS SUV 450 4MATIC, EQS SUV 450+, EQS SUV 580 4MATIC, 2024-2025 EQS SUV 680 4MATIC, and AMG EQE SUV 53 4MATIC vehicles. The battery management system software may cause the high-voltage battery to shut down, which can result in a sudden loss of drive power.

 

Remedy

Dealers will update the battery management system software, free of charge. Owner notification letters are expected to be mailed July 23, 2024. Owners may contact MBUSA customer service at 1-800-367-6372.

 

Notes

Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov.

 

Check if your Mercedes-Benz has a Recall

 

Mercedes-BenzeBay logo Part 573 Submission

Submitted to Portal May 24, 2024

Chronology-Only section

Chronology of Defect/Noncompliance Determination Supplement for ODI 22-00855-31051-10

In October 2023, MBAG investigated a single field report from a Mercedes-BenzeBay logo dealership in Denmark describing a warning message in the new vehicle’s instrument cluster related to the high voltage battery system that appeared prior to delivery of the vehicle to the customer. In November 2023, MBAG received a report alleging reduced drive power with a similar warning message in the US. In parallel, MBAG conducted further investigations of the described occurrences. MBAG initially hypothesized that the reported occurrences might stem from a fault in the battery management system of the high-voltage battery. However, further analyses showed that if the battery management system in certain vehicle models received an extraordinarily high volume of diagnostic requests from the vehicle’s control units, the module’s memory could be overloaded. In that event, the battery control module would re-set, in accordance with the design specifications. Between December 2023 and April 2024, MBAG conducted further investigations to determine the conditions and circumstances that might trigger a high volume of diagnostic requests from the control modules. This investigation has not identified any initial functional defect in software of those control units. However further testing indicated that a diagnostic data overflow to the battery management system could result in reduced power output or, in rare circumstances, a loss of propulsion.

The cause was narrowed down to various control units that were installed starting with change year 2023/1. Based on this knowledge, the known field cases were re-examined in April 2024. According to the results of the analysis the vehicles from all known field cases were produced after the referenced change year. Based on this finding, in May 2024 MBAG reviewed production records to determine the potentially affected vehicle population. On May 17, 2024, MBAG determined that a potential safety risk cannot be ruled out and decided to conduct a recall.

MBAG is currently aware of 17 field reports received from December 11, 2023 to March 26, 2024 in the US. MBAG is aware of no other information (such as the numbers of deaths and/or injuries) related to this defect in the USA.

 

30 Affected Products

Vehicles

MAKEMODELYEAR
MERCEDES-BENZeBay logoAMG EQE 53 4MATIC2024
MERCEDES-BENZeBay logoAMG EQE SUV 53 4MATIC2024-2025
MERCEDES-BENZeBay logoAMG EQS 53 4MATIC2024
MERCEDES-BENZeBay logoEQE 350 4MATIC2024
MERCEDES-BENZeBay logoEQE 350+2024
MERCEDES-BENZeBay logoEQE 5002024
MERCEDES-BENZeBay logoEQE SUV 350 4MATIC2023-2025
MERCEDES-BENZeBay logoEQE SUV 350+2023-2025
MERCEDES-BENZeBay logoEQE SUV 500 4MATIC2023-2025
MERCEDES-BENZeBay logoEQS 4502024
MERCEDES-BENZeBay logoEQS 450+2024
MERCEDES-BENZeBay logoEQS 5802024
MERCEDES-BENZeBay logoEQS SUV 450 4MATIC2023-2025
MERCEDES-BENZeBay logoEQS SUV 450+2023-2025
MERCEDES-BENZeBay logoEQS SUV 580 4MATIC2023-2025
MERCEDES-MAYBACHeBay logoEQS SUV 680 4MATIC2024-2025

 

3 Associated Documents

Recall 573 Report

RCLRPT-24V372-1533.PDF 223.951KB

 

Recall Acknowledgement

RCAK-24V372-9460.pdf 645.634KB

 

Chronology

RMISC-24V372-0984.pdf 128.441KB


⬇ Download PDF (125.43 KB)

 

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