Rework Wiring Harness for Communication Module – 2020 Mercedes-Benz AMG GT-Class

April 21, 2020 NHTSA CAMPAIGN NUMBER: 20V227000

Inaccurate Vehicle Location for Emergency Services

An inaccurate vehicle location or the inability to communicate with the call center may delay emergency responders, increasing the risk of injury in the event of an emergency.

 

NHTSA Campaign Number: 20V227

Manufacturer Mercedes-Benz USA, LLC.

Components COMMUNICATION

Potential Number of Units Affected 149

 

Summary

Mercedes-Benz USA, LLC. (MBUSA) is recalling certain 2020 AMG GT vehicles. The emergency call system (eCall) communication module may be missing the wiring harness ground line, which may cause the system to relay an inaccurate vehicle location, and restrict the ability to communicate verbally with the call center.

 

Remedy

MBUSA will notify owners, and dealers will repair the wiring harness of the communication module, free of charge. The recall began July 2, 2020. Owners may contact MBUSA customer service at 1-800-367-6372. MBUSA’s number for this recall is 2020060010.

 

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

 

---

TO: Mercedes-Benz Dealer Principals, General Managers, Sales Managers, Service Managers, Parts Managers	FROM:  Gregory Gunther, Department Manager, Vehicle Compliance and Analysis, Engineering Services
RE: Recall Campaign Initial Notification Rework Wiring Harness for Communication Module MY20 190 (AMG GT-Class)	DATE: April 28, 2020

 

IMPORTANT RECALL CAMPAIGN INFORMATION

Please see the attached documents related to the campaign listed above.

 

Please note that all customer inquiries should be directed to the Customer Assistance Center at 1-800-FORMERCEDES.

 

Sincerely,
Gregory Gunther
Department Manager, Vehicle Compliance & Analysis

---

Campaign No. :	NHTSA ID	Campaign Desc. :	Rework Wiring Harness for Communication Module
TBA	20V227	20P2197242
This is to notify you of a new Recall Campaign to rework wiring harness for communication module in 149 Model Year (“MY”) 2020 AMG GT-Class (190 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 28, 2020.
Background
Issue		Mercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz vehicles, has determined that on certain Model Year (“MY”) 2020 AMG GT-Class (190 platform) vehicles, a ground line in the wiring harness of the communication module for the emergency call system (eCall) may not have been installed. If the ground line is not installed, the ground connection of the communication module might be unintentionally established via the shielding of the microphone. Since the microphone’s shielding is not designed as a ground connection, the function of the communication module cannot be permanently ensured. Thus, in the event of an automatically or manually triggered emergency call, the determination of the vehicle position might be restricted. In addition, the ability of the vehicle occupants to communicate with the call center verbally could be impaired or prevented. As a consequence, emergency responders might not be guided to the vehicle. This might increase the risk of an injury following an emergency event. The customer might be made aware of a malfunction of the emergency call system by a SOS message in the instrument cluster.
What We’re Doing		MBUSA will conduct a voluntary recall.  An authorized Mercedes-Benz dealer will rework the wiring harness of the communication module on the affected vehicles.
Parts		Remedy is not available at this time. An additional notification will be sent once the remedy is available.
Vehicles Affected
Vehicle Model Year(s)		2020
Vehicle Model		AMG GT-Class
Vehicle Populations
Total Recall Population		149
Total Vehicles in Dealer Inventory		61
Given this notice, it is a violation of Federal law for a dealer to sell or lease any new MY20 AMG GT-Class vehicles in dealer inventory covered by this notification until the vehicle has been repaired.  Once the remedy is available, the vehicles will be flagged as “OPEN” and Work Instructions will be available in Star TekInfo.  Once the repair is complete the vehicle may be sold or leased. Loaner and demonstrator vehicles may continue to be driven, but must not be retailed until repaired.  Additionally, given this notice, it is a violation of Federal Law for car rental companies to rent MY20 AMG GT-Class vehicles covered by this notification until the vehicle has been repaired.
Next Steps/Notes
Customer Notification Timeline		Customer letters will be mailed approximately one week after the remedy becomes available.
AOMS/SOMS		AOMs – This recall may generate questions from your dealers. Please forward this notice to your dealers ASAP.
Rental Fleet Partners		This recall may affect vehicles in your fleet. Please contact your respective MBUSA fleet representative for further information and next steps. For repairs, please contact your preferred MBUSA dealer.
While we regret any inconvenience this may cause, MBUSA is determined to maintain a high level of vehicle quality and customer satisfaction. Please refer all customer inquiries to the Customer Assistance Center at 1-800-FOR-MERCEDES.

 

---

IMPORTANT SAFETY RECALL
This INTERIM notice applies to your vehicle, VIN:
Rework Wiring Harness for Communication Module
NHTSA Recall # 20V227

May, 2020

Dear Mercedes-Benz Owner,

This notice is sent to you in accordance with the requirements of the National Traffic and Motor Vehicle Safety Act.

Mercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz vehicles, has decided that a defect, which relates to motor vehicle safety, exists in certain Model Year (“MY”) 2020 AMG GT-Class vehicles.  Our records indicate that your vehicle is included in the affected population of vehicles.

 

What is the Concern?

In certain MY 2020 AMG GT-Class (190 platform) vehicles, a ground line in the wiring harness of the communication module for the emergency call system (eCall) may not have been installed.  In this case, the communication module may not function as intended.  In the event of an automatically or manually triggered emergency call, the determination of the vehicle position may not work correctly. In addition, the ability of the vehicle occupants to communicate with the call center verbally could be impaired or prevented.  As a consequence, emergency responders might not be guided to the vehicle.  This might increase the risk of an injury following an emergency event.  The customer might be made aware of a malfunction of the emergency call system by a SOS message in the instrument cluster

An authorized Mercedes-Benz dealer will repair the wiring harness of the communication module on the affected vehicles.  

Unfortunately, the parts to remedy this are not yet available.  We are working to obtain the necessary parts to correct this condition as quickly as possible.  As parts become available, we will send you another letter asking you to take your vehicle to an authorized Mercedes-Benz dealer to have the recall completed free of charge.

Should you have any concerns or questions regarding your vehicle before you receive the next recall letter when parts are available, please contact an authorized Mercedes-Benz dealer.  If for any reason a dealer is unable to remedy your situation, we are always happy to hear from you.  Please contact us at 1-800-367-6372.  A vehicle identification number (VIN)based recall lookup tool, on our MBUSA.com website, offers a search function that will indicate whether a vehicle has been subject to a safety recall, and whether that vehicle has had the free remedy performed. Please visit www.MBUSA.com/recall.

If you are no longer the vehicle owner, or have a change of address, please complete the reverse side of this letter and return the complete letter in the enclosed envelope.  If this is a leased vehicle and the lessor and registered owner receive this notice, please forward this information by first class mail to the lessee within 10 days to comply with federal regulations.

If a Mercedes-Benz dealer for any reason is unable to remedy the situation without charge, or within a reasonable amount of time, pursuant to law 49 U.S.C. Chapter 301, you may submit a complaint to the Administrator, National Highway Traffic Safety Administration, 1200 New Jersey Avenue, S.E., Washington, D.C. 20590 or call the toll-free Auto Safety Hotline at 1-888-3274236 (TTY 1-800-424-9153); or go to https://www.safercar.gov.

 

We regret any inconvenience this situation may cause you.

Sincerely,

Mercedes-Benz USA, LLC
A Mercedes-Benz AG Company
One Mercedes-Benz Drive
Sandy Springs, GA  30328 Phone (770) 705-0600

 

IMPORTANT VIN:

If for any reason YOU NO LONGER OWN THIS VEHICLE OR have a CHANGE OF ADDRESS, please COMPLETE THE SECTION BELOW, place in the ENCLOSED ENVELOPE, and DROP IN ANY MAIL BOX. If possible, provide the name and address of the present owner so that we may contact them.

 

---

TO: Mercedes-Benz Dealer Principals, General Managers, Sales Managers, Service Managers, Parts Managers	FROM:  Gregory Gunther, Department Manager, Vehicle Compliance and Analysis, Engineering Services
RE: Recall Campaign Launch Notification Rework Wiring Harness for Communication Module MY20 190 (AMG GT-Class)	DATE: June 26, 2020

 

IMPORTANT RECALL CAMPAIGN UPDATE

Please see the attached documents related to the campaign listed above.

 

Please note that all customer inquiries should be directed to the Customer Assistance Center at 1-800-FOR-MERCEDES.

 

Sincerely,

Gregory Gunther

Department Manager, Vehicle Compliance & Analysis

Recall Campaign Launch Notification			June 26, 2020
Campaign No. :	NHTSA ID	Campaign Desc. :	Rework Wiring Harness for Communication Module
2020060010	20V227	20P5491018
This is to notify you of the Recall Campaign Launch to rework wiring harness for communication module in 149 Model Year (“MY”) 2020 AMG GT-Class (190 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 “OPEN” on June 26, 2020.
Background
Issue		Mercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz vehicles, has determined that on certain Model Year (“MY”) 2020 AMG GT-Class (190 platform) vehicles, a ground line in the wiring harness of the communication module for the emergency call system (eCall) may not have been installed. If the ground line is not installed, the ground connection of the communication module might be unintentionally established via the shielding of the microphone. Since the microphone’s shielding is not designed as a ground connection, the function of the communication module cannot be permanently ensured. Thus, in the event of an automatically or manually triggered emergency call, the determination of the vehicle position might be restricted. In addition, the ability of the vehicle occupants to communicate with the call center verbally could be impaired or prevented. As a consequence, emergency responders might not be guided to the vehicle. This might increase the risk of an injury following an emergency event. The customer might be made aware of a malfunction of the emergency call system by a SOS message in the instrument cluster.
What We’re Doing		MBUSA will conduct a voluntary recall.  An authorized Mercedes-Benz dealer will rework the wiring harness of the communication module on the affected vehicles.
Parts		The remedy is available and can be performed.
Vehicles Affected
Vehicle Model Year(s)		2020
Vehicle Model		AMG GT-Class
Vehicle Populations
Total Recall Population		149
Total Vehicles in Dealer Inventory		56
Given this notice, it is a violation of Federal law for a dealer to sell or lease any new MY20 AMG GT-Class vehicles in dealer inventory covered by this notification until the vehicle has been repaired.  Once the remedy is available, the vehicles will be flagged as “OPEN” and Work Instructions will be available in Star TekInfo.  Once the repair is complete the vehicle may be sold or leased. Loaner and demonstrator vehicles may continue to be driven, but must not be retailed until repaired. Additionally, given this notice, it is a violation of Federal Law for car rental companies to rent MY20 AMG GT-Class vehicles covered by this notification until the vehicle has been repaired.
Next Steps/Notes
Customer Notification Timeline		Customer letters will be mailed on July 02, 2020.
AOMS/SOMS		AOMs – This recall may generate questions from your dealers. Please forward this notice to your dealers ASAP.
Rental Fleet Partners		This recall may affect vehicles in your fleet. Please contact your respective MBUSA fleet representative for further information and next steps. For repairs, please contact your preferred MBUSA dealer.
While we regret any inconvenience this may cause, MBUSA is determined to maintain a high level of vehicle quality and customer satisfaction. Please refer all customer inquiries to the Customer Assistance Center at 1-800-FOR-MERCEDES.

 

---

Campaign No. 2020060010, June 2020

TO:	ALL MERCEDES-BENZ CENTERS
SUBJECT:	Model AMG GT-Class (190 platform) Model Year 2020 Rework Wiring Harness for Communication Module

 

Mercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz vehicles, has determined that on certain Model Year (“MY”) 2020 AMG GT-Class (190 platform) vehicles, a ground line in the wiring harness of the communication module for the emergency call system (eCall) may not have been installed. If the ground line is not installed, the ground connection of the communication module might be unintentionally established via the shielding of the microphone. Since the microphone’s shielding is not designed as a ground connection, the function of the communication module cannot be permanently ensured. Thus, in the event of an automatically or manually triggered emergency call, the determination of the vehicle position might be restricted. In addition, the ability of the vehicle occupants to communicate with the call center verbally could be impaired or prevented. As a consequence, emergency responders might not be guided to the vehicle. This might increase the risk of an injury following an emergency event. The customer might be made aware of a malfunction of the emergency call system by a SOS message in the instrument cluster. An authorized Mercedes-Benz dealer will rework the wiring harness of the communication module on the affected vehicles.

 

Prior to performing this Recall Campaign:

• VMI must always be checked before performing campaigns to verify that the campaign is required on a specific vehicle. Always check for any other open campaigns, and perform
• Please review the entire Recall Campaign bulletin and follow the repair procedure exactly as described.

 

Please note that Recall Campaigns do not expire and may also be performed on a vehicle with a vehicle status indicator.

Approximately 149 vehicles are involved.

 

Order No. P-RC-2020060010

---

 

Work procedure 

 

1. Clamp off ground line.

 

2. Expose HERMES control unit.

Figure 1

 

3. Detach plug (A, figure 2) from soft top control unit.

Figure 2

 

4. Disconnect existing cable (brown) from PIN C connection from chamber 8 (figure 4) and connect in free chamber of the socket housing of wiring harness A190 540 26 09 (1, figure 3).
5. Insert loose pin (B, figure 3) of the aftermarket ground wiring harness into chamber 8 (C, figure 4) of the lower row and reconnect plug to soft top control unit.

Figure 3

 

Figure 4

 

6. Route pin (D, figure 3) of the ground wiring harness to the HERMES control unit as outlined in steps 6-7

 

7. Disconnect plug (E, figure 5) from HERMES control unit and remove contact carrier.

Figure 5

 

7. Insert loose pin (D, figure 3) of the ground wiring harness into chamber 26 (F, figure 6), complete plug and connect to HERMES control unit.

Figure 6

 

8. Fasten ground line with additional cable ties.

 

9. Assemble in reverse order.

 

10. Connect ground line.

 

11. Clear fault memory and check soft top for proper operation.

 

Primary Parts Information

Qty.	Part Name	Part Number
1	Ground wiring harness	A 190 540 26 09

 

 

Warranty Information

Operation: Connect/disconnect starter battery charger (02-5058)

Connect/disconnect vehicle diagnosis system (02-4762)

Perform aftermarket installation of ground line for HERMES control unit (02-1584)

Includes: Clear fault memory and soft top function check

Damage Code	Operation Number	Labor Time (hrs.)
54 910 18 7	02-5058*	0.1
	02-4762*	0.1
	02-1584	1.2

 

*Invoice operation item only once for each work order.

Note

Operation Number labor times are subject to change.

 

---

IMPORTANT SAFETY RECALL 2020060010
This notice applies to your vehicle, VIN:
Rework Wiring Harness for Communication Module
NHTSA Recall # 20V227

July, 2020

• A remedy is available for your vehicle.
• Schedule an appointment with your authorized Mercedes-Benz dealer as soon as possible.
• This repair will be provided free of charge.

 

2020060010

Dear Mercedes-Benz Owner:

This notice is sent to you in accordance with the requirements of the National Traffic and Motor Vehicle Safety Act.

Mercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz vehicles, has decided that a defect which relates to motor vehicle safety exists in certain Model Year (“MY”) 2020 AMG GT-Class vehicles. Our records indicate that your vehicle is included in the affected population of vehicles.

What is the CONCERN?	In certain MY 2020 AMG GT-Class (190 platform) vehicles, a ground line in the communication module wiring harness for the emergency call system (eCall) may not have been installed.  In this case, the communication module may not function as intended.  In the event of an automatically or manually triggered emergency call, the determination of the vehicle position may not work correctly. In addition, the ability of the vehicle occupants to communicate with the call center verbally could be impaired or prevented. As a consequence, emergency responders might not be guided to the vehicle. This might increase the risk of an injury following an emergency event. The customer might be made aware of a malfunction of the emergency call system by a SOS message in the instrument cluster.
What will your DEALER DO?	An authorized Mercedes-Benz dealer will repair the communication module wiring harness on the affected vehicles. This service will be provided free of charge. We are dedicated to always delivering the best customer experience, and respect for your time is a top priority.  While the minimum repair time can be less than 2 hours, your dealer can provide you with a better estimate of the overall time for this service visit.  As a matter of normal service process, an authorized Mercedes-Benz dealer will also check for other repair measures which might be applicable to your vehicle which may increase the required working time.
What should YOU DO?	For additional information and to schedule an appointment, please contact your preferred authorized Mercedes-Benz dealer at your earliest convenience. To locate authorized dealers see  www.MBUSA.com/recall.  Please mention you are scheduling an appointment to repair the wiring harness of the communication module under Recall Campaign # 2020060010.You may be asked for your 17-digit Vehicle Identification Number (VIN) which for your convenience is located above your name at the top of this letter.  Impacts from COVID-19: Your health and safety remain our top priority. The Mercedes-Benz dealerships remaining open for recall repairs and service are closely following the guidelines set forth by the CDC.  Free Mobile Repair at your home or business as well as vehicle pick-up and delivery may be available.   Your preferred authorized Mercedes-Benz dealer can confirm availability.
Information for Owners	In the event that you are no longer the vehicle owner, or have had a change of address, please complete the reverse side and return the updated information in the enclosed envelope. If this is a leased vehicle and the lessor and registered owner receive this notice, please forward this information by first class mail to the lessee within 10 business days to comply with Federal Regulations.

 

To find the most convenient  authorized  Mercedes-Benz dealer from your smartphone, scan the QR code to  the left.

If an authorized Mercedes-Benz dealer for any reason is unable to remedy the situation without charge, or within a reasonable amount of time, pursuant to law 49 U.S.C. Chapter 301, you may submit a complaint to the Administrator, National Highway Traffic Safety Administration, 1200 New Jersey Avenue, S.E., Washington, D.C. 20590 or call the toll-free Auto Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153); or go to https://www.safercar.gov.A VIN-based recall lookup tool on our MBUSA.com website now offers a search feature that will indicate whether a vehicle has been subject to a safety recall, and whether that vehicle has had the free remedy performed. See www.mbusa.com/recall. Should you have any questions or encounter any difficulty regarding this Recall Campaign, please contact an authorized Mercedes-Benz dealer. If for any reason a dealer is unable to remedy your situation, we are always happy to hear from you. Please contact us at 1-(800) FOR-MERCEDES (1-800-367-6372).

 

We apologize for any inconvenience this situation may cause you.

Sincerely,

Mercedes-Benz USA, LLC
A Mercedes-Benz AG Company
One Mercedes-Benz Drive
Sandy Springs, GA  30328
Phone (770) 705-0600

 

IMPORTANT VIN:

If for any reason YOU NO LONGER OWN THIS VEHICLE OR have a CHANGE OF ADDRESS, please COMPLETE THE SECTION BELOW, place in the ENCLOSED ENVELOPE, and DROP IN ANY MAIL BOX. If possible, provide the name and address of the present owner so that we may contact them.

 

---

1 Affected Product

Vehicle

MAKE	MODEL	YEAR
MERCEDES-BENZ	AMG GT	2020

 

---

12 Associated Documents

ISSUED Interim Owner Notification Letter(Part 577)

RIONL-20V227-2696.pdf 187.481KB

 

---

Recall 573 Report – Amendment 2

RCLRPT-20V227-8675.PDF 215.014KB

 

---

Defect Notice 573 Report

RCLRPT-20V227-5861.PDF 214.992KB

 

---

Recall Acknowledgement

RCAK-20V227-9707.pdf 244.794KB

 

---

Recall 573 Report – Amendment 4

RCLRPT-20V227-3494.PDF 215.011KB

 

---

ISSUED Owner Notification Letter(Part 577)

RCONL-20V227-1633.pdf 441.918KB

 

---

Recall 573 Report – Amendment 1

RCLRPT-20V227-7687.PDF 215.015KB

 

---

Manufacturer Notices(to Dealers,etc)- Recall Campaign Initial Notification Rework Wiring Harness for Communication Module

RCMN-20V227-2788.pdf 170.665KB

 

---

Manufacturer Notices(to Dealers,etc)- Recall Campaign Launch Notification Rework Wiring Harness for Communication Module

RCMN-20V227-1675.pdf 437.322KB

 

---

Recall 573 Report – Amendment 3

RCLRPT-20V227-1061.PDF 215.018KB

 

---

Recall Quarterly Report #1, 2020-3

RCLQRT-20V227-5656.PDF 211.145KB

 

---

Recall Quarterly Report #2, 2020-4

RCLQRT-20V227-9320.PDF 211.246KB

 

---

Latest Recalls Documents

https://www-odi.nhtsa.dot.gov/acms/cs/documentList.xhtml?docId=20V227&docType=RCL

 

---

 

Last update on 2025-05-08 / Affiliate links / Images from Amazon Product Advertising API

---

 

This product presentation was made with AAWP plugin.