Check the 48V Ground Connection – 2020-2022 Mercedes-Benz GLE-Class & GLS-Class

April 8, 2022 NHTSA CAMPAIGN NUMBER: 22V231000

Unsecured Ground Connection Bolt

An overheated electrical cable can increase the risk of a fire.

 

NHTSA Campaign Number: 22V231

Manufacturer Mercedes-BenzeBay logo USA, LLC

Components ELECTRICAL SYSTEM

Potential Number of Units Affected 21,306

 

Summary

Mercedes-BenzeBay logo USA, LLC (MBUSA) is recalling certain 2020-2022 GLE450, GLS450, 2021-2022 AMG GLE53, 2020-2021 GLE580, GLS580, 2021 AMG GLE63, MaybacheBay logo GLS600 and AMG GLS63 vehicles. A ground cable bolt for the 48V ground connection under the front passenger seat may not be secured properly, which can cause the electrical cable to overheat.

 

Remedy

Dealers will inspect and tighten the ground cable bolt, as necessary, free of charge. Owner notification letters were mailed July 8, 2022. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA’s number for this recall is 2022040017.

 

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.nhtsa.gov.

 

Check if your Mercedes-Benz has a Recall

 


June 10, 2022

2022040017

Check 48V Ground Connection

This is to notify you of a new Recall Campaign to check the 48V ground connection on 21,306 Model Year (โ€œMYโ€) 2020-2022 GLE-Class and GLS-Class (167 platform) vehicles.  The recall campaign will be visible on the www.safercar.gov website and may generate questions from customers.  Affected VINs will be flagged in VMI as “PENDING” on April 15, 2022.

 

Issue

Mercedes-BenzeBay logo AG (โ€œMBAGโ€), the manufacturer of Mercedes-BenzeBay logo vehicles, has determined that on certain Model Year (โ€œMYโ€) 2020-2022 GLE-Class and GLS-Class (167 platform) vehicles, the 48V ground connection located under the front passenger seat might not be tightened to the specified torque.  In this case, the ground cable lug might not be correctly secured. Subsequently, the electrical resistance at the connection might increase. In combination with the high electrical currents potentially flowing through this connection, the temperature in this area might increase. As a consequence, a risk of fire cannot be ruled out.  When the issue occurs, warning messages are displayed in the instrument cluster relating to the 48V onboard power supply.

 

What Weโ€™re Doing

MBUSA will conduct a voluntary recall.  An authorized Mercedes-BenzeBay logo dealer will inspect the ground connection torque on the affected vehicles and correct it, if necessary.

 

Parts

The remedy is available and can be performed. Please note that the estimated replacement rate is 3%. Parts should only be ordered in the event a replacement is required.

 


Check threaded connection of electrical wiring harness of 48 V on-board electrical system battery to body, replace wiring harness if necessary 

 

Check/test procedure

1. Release right front seat and tilt forward.

The front seat remains in the vehicle with connected wiring harness.

For basic data, see AR91.10-P-1000ME.

 

2. Remove trim from right rear entrance.

For basic data, see AR68.30-P-4100ME.

 

3. Loosen trim at right front entrance in area of lower right B-pillar trim.

For basic data, see AR68.30-P-4100ME.

 

4. Remove trim of lower right B-pillar.

For basic data, see AR68.30-P-4700ME.

The upper B-pillar trim is only loosened and remains in the vehicle with connected lines.

 

5. Expose right rear floor covering to the extent that the “W106/1” ground point is accessible for the electrical wiring harness of the 48 V on-board electrical system battery (Figure 1).

For basic data, see AR68.80-P-0003ME.

 

6. Disconnect ground line from 12 V on-board electrical system battery.

For basic data, see AR54.10-P-0003ME.

 

7. Disconnect and check threaded connection of the electrical wiring harness of 48 V on-board electrical system battery of “W106/1” ground point on the body (Figures 1 and 2).

Ensure there are no traces of thermal overload, arching, or scaling.

Figure 2 is showing an image that is not OK!

 

a. If traces of debris/arching are present on the wiring harness to “W106/1” ground point: : Carry out work procedures A and B.

b. If traces of debris/arching are not present on the wiring harness to “W106/1” ground point: Carry out work procedure B.

 

Work procedure A

1. Replace the electrical wiring harness from the “W106/1” ground point to 48 V on-board electrical system battery.

Thoroughly clean area of debris/arching traces.

If the ground bolt also shows signs of arching or damage, the ground bolt must be replaced.

If traces of arching or damage are present at the surrounding component parts, such as the floor covering, these component parts must be replaced.

 

Work procedure B

  1. Connect electrical wiring harness of the 48 V on-board electrical system battery to “W106/1″ ground point. Torque of the electrical wiring harness”W106/1” ground point threaded connection ย 16!

During installation of the electrical wiring harness to the “W106/1” ground point, a clean contact surface of the cable lug from the electrical wiring harness and the “W106/1” ground point shall be ensured.

2. Assemble in reverse order.

3. Connect XENTRY Diagnosis.

4. Erase fault memory.

5. Disconnect XENTRY Diagnosis.

 

Primary Parts Information

Qty. Part Name Part Number
As required (1)Wiring harnessA 167 540 19 08

 


Chronology :

In late January 2021, MBAG launched initial investigations based on individual field reports from outside the US describing instances in which customers allegedly experienced the subject condition outlined above.

Although only isolated cases were known from the field at that point in time, potentials for improvement of the ground connection series bolting process were identified during these investigations and implemented accordingly.

In February 2021, one case was reported from the US.

In April 2021, a plant action to address potentially affected vehicles was launched.

However, in May 2021, further detailed investigations to identify whether a systematic failure mechanism existed for the known cases were started. While these investigations were ongoing, a further case from outside the US was reported affecting a vehicle that was produced after the mentioned improvements had been implemented in the series production process. Accordingly, analyses regarding the root cause were restarted anew.

In October 2021, these analyses indicated an influence from the vehicle rework process, which was improved accordingly. Subsequently, vehicles potentially affected from this issue due to a rework on the subject bolt connection were identified.

In parallel and through January 2022, MBAG evaluated potential consequences of the untightening of the 48V ground connection in the affected vehicles. In February- March 2022, MBAG reviewed all reported field complaints and validated that the reported claims regarding the ground connection were caused by insufficient torque at the grounding bolt.

MBAG has not received any reports of crashes, injuries, or property damage, associated with this issue.

However, on April 1, 2022, MBAG determined that a potential safety risk cannot be ruled out and decided to conduct a recall.

 


15 Affected Products

Vehicles

MAKEMODELYEAR
MERCEDES-BENZeBay logoAMG GLE532021-2022
MERCEDES-BENZeBay logoAMG GLE632021
MERCEDES-BENZeBay logoAMG GLS632021
MERCEDES-BENZeBay logoGLE4502020-2022
MERCEDES-BENZeBay logoGLE5802020-2021
MERCEDES-BENZeBay logoGLS4502020-2022
MERCEDES-BENZeBay logoGLS5802020-2021
MERCEDES-BENZeBay logoMAYBACHeBay logo GLS6002021

 


12 Associated Documents

Recall Acknowledgement

RCAK-22V231-6348.pdf 651.401KB

 


Defect Notice 573 Report

RCLRPT-22V231-5722.PDF 220.881KB

 


Manufacturer Notices(to Dealers,etc)

RCMN-22V231-6545.pdf 140.129KB

 


Recall 573 Report – June 2, 2022

RCLRPT-22V231-7623.PDF 220.919KB

 


Interim Owner Notification Letter(Part 577)

RIONL-22V231-8843.pdf 291.174KB

 


Remedy Instructions and TSB

RCRIT-22V231-1563.pdf 414.41KB

 


Recall 573 Report – June 10, 2022

RCLRPT-22V231-5169.PDF 220.906KB

 


Manufacturer Notices(to Dealers,etc)

RCMN-22V231-6075.pdf 512.885KB

 


ISSUED Owner Notification Letter(Part 577)

RCONL-22V231-1909.pdf 442.889KB

 


Recall 573 Report – July 8 ,2022

RCLRPT-22V231-3424.PDF 220.921KB

 


Recall Quarterly Report #1, 2022-3

RCLQRT-22V231-3115.PDF 211.137KB

 


Recall Quarterly Report #2, 2022-4

RCLQRT-22V231-3943.PDF 211.24KB

 


Latest Recalls Documents

https://www-odi.nhtsa.dot.gov/acms/cs/documentList.xhtml?docId=22V231&docType=RCL

 


 

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