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May 24, 2024 NHTSA CAMPAIGN NUMBER: 24V371000
Seat Wiring Harnesses Incorrectly Routed
A damaged wiring harness can prevent the air bags installed in the seats from deploying as intended during a crash, increasing the risk of injury.
NHTSA Campaign Number: 24V371
Manufacturer Mercedes-Benz USA, LLC
Components ELECTRICAL SYSTEM, SEATS
Potential Number of Units Affected 18
Summary
Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2023 AMG C43 4MATIC vehicles, equipped with AMG Performance seats. The seat wiring harness may be incorrectly routed, which can cause it to become damaged when the seat is fully reclined.
Remedy
Dealers will inspect and reroute the wiring harness, as necessary, 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
Chronology :
At the end of March 2023, MBAG launched initial investigations based on internal reports during vehicle end-of-line testing. MBAG found that in certain vehicles equipped with AMG performance seats, the seat wiring harness might not have been routed with the required distance between the seat frame and the fastening location.
As an immediate measure, MBAG initiated a plant campaign to check and rework vehicles that remained in MBAG’s control to reroute the seat wiring harness.
In May 2023, MBAG implemented a production adjustment to the routing of the wiring harness with reduced tolerances for vehicles equipped with AMG Performance Seats.
In parallel the ongoing root cause analysis concluded that in isolated cases, the routing of the seat wiring harness might result in the seat frame contacting the harness. Such contact could result in damage to the harness and certain wiring.
From June 2023, MBAG evaluated potential consequences of a damaged wiring harness in the affected vehicles. This analysis identified that this issue could affect the operation of the thorax-pelvis side airbag and PRESAFE impulse side airbag. In late 2023, MBAG then conducted additional investigations and testing to identify the potential failure mechanism and impact on the performance or behavior of these airbags over the vehicle’s lifetime.
Based on the above investigations and analyses, from April through May 2024, MBAG determined the potentially affected vehicle population in the field.
On May 17, 2024, MBAG determined that a potential safety risk in the identified vehicle population cannot be ruled out and decided to conduct a recall.
MBAG is aware of no field reports, warranty claims, or other information (such as the numbers of deaths and/or injuries) related to this defect worldwide.
1 Affected Product
Vehicle
| MAKE | MODEL | YEAR |
| MERCEDES-BENZ | AMG C43 | 2023 |
2 Associated Documents
Defect Recall 573 Report
RCLRPT-24V371-1544.PDF 214.867KB
Recall Acknowledgement
RCAK-24V371-7273.pdf 702.413KB
Latest Recalls Documents
https://www-odi.nhtsa.dot.gov/acms/cs/documentList.xhtml?docId=24V371&docType=RCL
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OMB Control No.: 2127-0004
Part 573 Safety Recall Report 24V-371
The information contained in this report was submitted pursuant to 49 CFR §573
Manufacturer Name : Mercedes-Benz USA, LLC
Submission Date : MAY 24, 2024
NHTSA Recall No. : 24V-371
Manufacturer Recall No. : NR
Manufacturer Information :
Manufacturer Name : Mercedes-Benz USA, LLC
Address : 13470 International Parkway
Jacksonville FL 32218
Company phone : 1-877-496-3691
Population :
Number of potentially involved : 18
Estimated percentage with defect : 100 %
Vehicle Information :
Vehicle 1 : 2023-2023 Mercedes-Benz Mercedes-AMG C43 4MATIC
Vehicle Type : LIGHT VEHICLES
Body Style : 4-DOOR
Power Train : GAS
Descriptive Information : Mercedes-Benz 2023 C43 4MATIC, 18 Vehicles. The recall population was determined
through production records. Vehicles outside of the recall population have the seat
wiring harness routed according to current production specifications.
Production Dates : MAR 10, 2023 – APR 14, 2023
VIN Range 1 : Begin : NR End : NR Not sequential
Description of Defect :
Description of the Defect : Mercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz vehicles, has
determined that on certain Model Year (“MY”) 2023 C-Class (206 platform)
vehicles equipped with AMG Performance Seats, the seat wiring harness
routing might not meet current production specifications.
FMVSS 1 : NR
FMVSS 2 : NR
Description of the Safety Risk : In this case, the seat wiring harness of the driver and front passenger seat
might become damaged when the seatback is fully reclined.
As a consequence, it cannot be ruled out that the functionality of the airbags
installed in the affected seat might be impaired. This could increase the risk of
injury in the event of a crash with airbag deployment.
Description of the Cause : Due to a deviation in the vehicle development process, the seat wiring harness
routing might not meet current production specifications.
Identification of Any Warning
that can Occur :
When the wiring is damaged, the driver might notice a red warning message
regarding an airbag malfunction in the instrument cluster.
Part 573 Safety Recall Report 24V-371 Page 2
The information contained in this report was submitted pursuant to 49 CFR §573
Involved Components :
Component Name 1 : SEAT ELECTRICAL WIRING HARNESS
Component Description : SEAT ELECTRICAL WIRING HARNESS
Component Part Number : A2065403873
Component Name 2 : SEAT ELECTRICAL WIRING HARNESS
Component Description : SEAT ELECTRICAL WIRING HARNESS
Component Part Number : A2065403973
Supplier Identification :
Component Manufacturer
Name : MBAG
Address : NR
NR
Country : NR
Chronology :
At the end of March 2023, MBAG launched initial investigations based on internal reports during vehicle endof-
line testing. MBAG found that in certain vehicles equipped with AMG performance seats, the seat wiring
harness might not have been routed with the required distance between the seat frame and the fastening
location.
As an immediate measure, MBAG initiated a plant campaign to check and rework vehicles that remained in
MBAG’s control to reroute the seat wiring harness.
In May 2023, MBAG implemented a production adjustment to the routing of the wiring harness with reduced
tolerances for vehicles equipped with AMG Performance Seats.
In parallel the ongoing root cause analysis concluded that in isolated cases, the routing of the seat wiring
harness might result in the seat frame contacting the harness. Such contact could result in damage to the
harness and certain wiring.
From June 2023, MBAG evaluated potential consequences of a damaged wiring harness in the affected vehicles.
This analysis identified that this issue could affect the operation of the thorax-pelvis side airbag and PRESAFE
impulse side airbag. In late 2023, MBAG then conducted additional investigations and testing to identify the
potential failure mechanism and impact on the performance or behavior of these airbags over the vehicle’s
lifetime.
Part 573 Safety Recall Report 24V-371 Page 3
The information contained in this report was submitted pursuant to 49 CFR §573
Based on the above investigations and analyses, from April through May 2024, MBAG determined the
potentially affected vehicle population in the field.
On May 17, 2024, MBAG determined that a potential safety risk in the identified vehicle population cannot be
ruled out and decided to conduct a recall.
MBAG is aware of no field reports, warranty claims, or other information (such as the numbers of deaths and/
or injuries) related to this defect worldwide.
Description of Remedy :
Description of Remedy Program : An authorized Mercedes-Benz dealer will check the seat wiring harness
routing on the affected vehicles and rework it, if necessary.
Pursuant to 49 C.F.R. § 577.11(e), MBUSA does not plan to provide notice
about pre-notice reimbursement to owners since none of the involved
vehicles would have been previously subject to the condition described
and all remain covered under the new vehicle warranty.
How Remedy Component Differs
from Recalled Component :
Vehicles outside of the recall population have the seat wiring harness
routed according to current production specifications.
Remedy Part No:
SEAT ELECTRICAL WIRING HARNESS A2065403873
SEAT ELECTRICAL WIRING HARNESS A2065403973
Identify How/When Recall Condition
was Corrected in Production :
A change in the routing and a reduction of tolerances ensures that this
issue can no longer occur from May 25, 2023 onwards.
Recall Schedule :
Description of Recall Schedule : Dealers will be notified of the pending voluntary recall campaign on June
3, 2024. Owners will be notified of the voluntary recall campaign before
July 23, 2024. A copy of all communications will be provided when
available.
Planned Dealer Notification Date : JUN 03, 2024 – NR
Planned Owner Notification Date : JUL 23, 2024 – NR
* NR – Not Reported
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