Inspect 12V and 48V Ground Connections – 2022-2023 Mercedes-Benz C-Class

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 23V-463 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Mercedes-Benz USA, LLC Submission Date : JUN 30, 2023 NHTSA Recall No. : 23V-463 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 : 1,552 Estimated percentage with defect : 100 % Vehicle Information : Vehicle 1 : 2022-2023 Mercedes-Benz C300 Vehicle Type : LIGHT VEHICLES Body Style : 4-DOOR Power Train : GAS Descriptive Information : 1,506 vehicles. The recall population was determined through production records. Vehicles outside of the recall population meet the torque specifications for the 12V and 48V ground connections. Production Dates : JUL 09, 2021 – JUN 06, 2023 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 2 : 2023-2023 Mercedes-Benz AMG C43 Vehicle Type : LIGHT VEHICLES Body Style : 4-DOOR Power Train : GAS Descriptive Information : 46 vehicles. The recall population was determined through production records. Vehicles outside of the recall population meet the torque specifications for the 12V and 48V ground connections. Production Dates : JUL 09, 2021 – JUN 06, 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”) 2022-2023 C-Class (206 platform) vehicles, the 12V and 48V ground connections might not meet current torque specifications. FMVSS 1 : NR Part 573 Safety Recall Report 23V-463 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 FMVSS 2 : NR Description of the Safety Risk : In this case, the wiring harness might not be fixed correctly. Subsequently, the electric resistance of the connection might increase. Thus, the temperature in this area might increase and a risk of fire cannot be ruled out completely. Description of the Cause : Due to a deviation in the production process, several 12V and 48V ground connections might not meet torque specifications. Identification of Any Warning that can Occur : Before the issue occurs, the driver will not receive a warning due to the nature of the failure mechanism. When the issue occurs, the driver might notice a warning message in the instrument cluster. Involved Components : Component Name 1 : Electrical Wiring Harness Component Description : Electrical Wiring Harness Component Part Number : A2065400354 Component Name 2 : Nut Component Description : Nut Component Part Number : N000000008271 Supplier Identification : Component Manufacturer Name : Mercedes-Benz AG Address : NR Foreign States Country : Germany Chronology : In early 2022, MBAG initiated investigations into individual field reports from outside the US involving loose grounding bolt connections that resulted in warning messages or other complaints from customers. Although only isolated cases were known in the field at that point, MBAG’s investigations identified potential for improvements to the series bolting process for the vehicle’s wiring harness. In March 2022, a plant action was launched to implement improvements to that process and to address any potentially affected vehicles. In April Part 573 Safety Recall Report 23V-463 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 2022, MBAG initiated a further detailed investigation to identify whether the known field reports were caused by a single failure mechanism. During this investigation, in June 2022, MBAG received further field reports involving cases related to insufficient tightening of the grounding bolt for the engine wiring harness. These reports included vehicles produced after the March 2022 plant action. Accordingly, from November 2022 to May 2023, MBAG evaluated potential consequences associated with insufficient tightening of the 12V and 48V ground connections. This evaluation included a review of all reported field complaints involving insufficient torque to the grounding bolts. In March 2023, MBAG implemented several additional measures in the plant’s rework process, including weekly bolt torque checks, an additional dedicated operator for the ground connection rework, a PDA Check at the Quality Gate, and monthly sample checks. In parallel, MBAG continued its investigation into the potential consequences associated with insufficient tightening of the grounding connections, as well as identification of potentially affected vehicles. Please see chronology supplement. Description of Remedy : Description of Remedy Program : An authorized Mercedes-Benz dealer will inspect the bolting of the 12V and 48V ground connections and perform repairs, 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 meet the torque specifications for the 12V and 48V ground connections. Remedy Parts: A2065400354 (Electrical Wiring Harness), N000000008271 (Nut). Identify How/When Recall Condition was Corrected in Production : A change in the production procedure ensures that this issue can no longer occur from June 7, 2023 onwards. Recall Schedule : Description of Recall Schedule : Dealers will be notified of the pending voluntary recall campaign on July 7, 2023. Owners will be notified of the voluntary recall campaign before August 29, 2023. A copy of all communications will be provided when available. Planned Dealer Notification Date : JUL 07, 2023 – NR Planned Owner Notification Date : AUG 29, 2023 – NR * NR – Not Reported

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Recall Campaign Initial Notification

DATE: July 7, 2023

Mercedes-Benz USA, LLC A Mercedes-Benz Group AG Company One Mercedes-Benz Drive Sandy Springs, GA 30328 770.705.0600 News Channel Update | Vehicle Compliance & Analysis 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-FOR-MERCEDES. Sincerely, Gregory Gunther Senior Manager, Vehicle Compliance & Analysis TO: Mercedes-Benz Dealer Principals, General Managers, Sales Managers, Service Managers, Parts Managers FROM: Gregory Gunther, Senior Manager, Vehicle Compliance and Analysis, Engineering Services RE: Recall Campaign Initial Notification Inspect 12V and 48V Ground Connections MY22-23 C-Class (206 platform) DATE: July 7, 2023 Mercedes-Benz USA, LLC A Mercedes-Benz Group AG Company One Mercedes-Benz Drive Sandy Springs, GA 30328 770.705.0600 News Channel Update | Vehicle Compliance & Analysis Recall Campaign Initial Notification July 7, 2023 Campaign No. : NHTSA ID Campaign Desc. : Inspect 12V and 48V Ground Connections TBD 23V463 23P2197616 23P2197618 This is to notify you of the new Recall Campaign to inspect the 12V and 48V ground connections on 1,552 Model Year (“MY”) 2022-2023 C-Class (206 platform) vehicles. The recall campaign will be visible on the www.NHTSA.gov website and may generate questions from customers. Affected VINs will be flagged in VMI as “PENDING” on July 7, 2023. Background Issue Mercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz vehicles, has determined that on certain Model Year (“MY”) 2022-2023 C-Class (206 platform) vehicles, the 12V and 48V ground connections might not meet current torque specifications. In this case, the wiring harness connector might not be tightened sufficiently. Subsequently, the electric resistance of the connection might increase. Thus, the temperature in this area might increase and a risk of fire cannot be ruled out completely. What We’re Doing MBUSA will conduct a voluntary recall. An authorized Mercedes-Benz dealer will inspect the fastening of the 12V and 48V ground connections and perform repairs, if necessary. Parts Remedy is not available at this time. Vehicles Affected Vehicle Model Year(s) 2022-2023 Vehicle Model C-Class Vehicle Populations Total Recall Population 1,552 Total Vehicles in Dealer Inventory 13 Given this notice, it is a violation of Federal law for a dealer to sell or lease any new 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 NetStar VMI and Xentry Portal. 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. As a matter of normal service process, please check for other repair measures which might be applicable to the vehicle(s). Additionally, given this notice, it is a violation of Federal Law for car rental companies to rent new vehicles covered by this notification until the vehicle has been repaired. Next Steps/Notes Customer Notification Timeline Customer letters will be mailed on or before August 29, 2021. 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. Customer Reimbursement Customer reimbursement is not being offered for this campaign. 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.

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 23V-463 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Mercedes-Benz USA, LLC Submission Date : JUL 27, 2023 NHTSA Recall No. : 23V-463 Manufacturer Recall No. : 2023070016, 17, 18 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 : 1,552 Estimated percentage with defect : 100 % Vehicle Information : Vehicle 1 : 2022-2023 Mercedes-Benz C300 Vehicle Type : LIGHT VEHICLES Body Style : 4-DOOR Power Train : GAS Descriptive Information : 1,506 vehicles. The recall population was determined through production records. Vehicles outside of the recall population meet the torque specifications for the 12V and 48V ground connections. Production Dates : JUL 09, 2021 – JUN 06, 2023 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 2 : 2023-2023 Mercedes-Benz AMG C43 Vehicle Type : LIGHT VEHICLES Body Style : 4-DOOR Power Train : GAS Descriptive Information : 46 vehicles. The recall population was determined through production records. Vehicles outside of the recall population meet the torque specifications for the 12V and 48V ground connections. Production Dates : JUL 09, 2021 – JUN 06, 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”) 2022-2023 C-Class (206 platform) vehicles, the 12V and 48V ground connections might not meet current torque specifications. FMVSS 1 : NR Part 573 Safety Recall Report 23V-463 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 FMVSS 2 : NR Description of the Safety Risk : In this case, the wiring harness might not be fixed correctly. Subsequently, the electric resistance of the connection might increase. Thus, the temperature in this area might increase and a risk of fire cannot be ruled out completely. Description of the Cause : Due to a deviation in the production process, several 12V and 48V ground connections might not meet torque specifications. Identification of Any Warning that can Occur : Before the issue occurs, the driver will not receive a warning due to the nature of the failure mechanism. When the issue occurs, the driver might notice a warning message in the instrument cluster. Involved Components : Component Name 1 : Electrical Wiring Harness Component Description : Electrical Wiring Harness Component Part Number : A2065400354 Component Name 2 : Nut Component Description : Nut Component Part Number : N000000008271 Supplier Identification : Component Manufacturer Name : Mercedes-Benz AG Address : NR Foreign States Country : Germany Chronology : In early 2022, MBAG initiated investigations into individual field reports from outside the US involving loose grounding bolt connections that resulted in warning messages or other complaints from customers. Although only isolated cases were known in the field at that point, MBAG’s investigations identified potential for improvements to the series bolting process for the vehicle’s wiring harness. In March 2022, a plant action was launched to implement improvements to that process and to address any potentially affected vehicles. In April Part 573 Safety Recall Report 23V-463 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 2022, MBAG initiated a further detailed investigation to identify whether the known field reports were caused by a single failure mechanism. During this investigation, in June 2022, MBAG received further field reports involving cases related to insufficient tightening of the grounding bolt for the engine wiring harness. These reports included vehicles produced after the March 2022 plant action. Accordingly, from November 2022 to May 2023, MBAG evaluated potential consequences associated with insufficient tightening of the 12V and 48V ground connections. This evaluation included a review of all reported field complaints involving insufficient torque to the grounding bolts. In March 2023, MBAG implemented several additional measures in the plant’s rework process, including weekly bolt torque checks, an additional dedicated operator for the ground connection rework, a PDA Check at the Quality Gate, and monthly sample checks. In parallel, MBAG continued its investigation into the potential consequences associated with insufficient tightening of the grounding connections, as well as identification of potentially affected vehicles. Please see chronology supplement. Description of Remedy : Description of Remedy Program : An authorized Mercedes-Benz dealer will inspect the bolting of the 12V and 48V ground connections and perform repairs, 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 meet the torque specifications for the 12V and 48V ground connections. Remedy Parts: A2065400354 (Electrical Wiring Harness), N000000008271 (Nut). Identify How/When Recall Condition was Corrected in Production : A change in the production procedure ensures that this issue can no longer occur from June 7, 2023 onwards. Recall Schedule : Description of Recall Schedule : Dealers will be notified of the pending voluntary recall campaign on July 7, 2023. Owners will be notified of the voluntary recall campaign before August 29, 2023. A copy of all communications will be provided when available. Planned Dealer Notification Date : JUL 07, 2023 – NR Planned Owner Notification Date : AUG 29, 2023 – NR * NR – Not Reported

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Recall Campaign Launch Notification

DATE: August 4, 2023

Mercedes-Benz USA, LLC A Mercedes-Benz Group AG Company One Mercedes-Benz Drive Sandy Springs, GA 30328 770.705.0600 News Channel Update | Vehicle Compliance & Analysis 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 Senior Manager, Vehicle Compliance & Analysis TO: Mercedes-Benz Dealer Principals, General Managers, Sales Managers, Service Managers, Parts Managers FROM: Gregory Gunther, Senior Manager, Vehicle Compliance and Analysis, Engineering Services RE: Recall Campaign Launch Notification Inspect 12V and 48V Ground Connections MY22-23 C-Class (206 platform) DATE: August 4, 2023 Mercedes-Benz USA, LLC A Mercedes-Benz Group AG Company One Mercedes-Benz Drive Sandy Springs, GA 30328 770.705.0600 News Channel Update | Vehicle Compliance & Analysis Recall Campaign Launch Notification August 4, 2023 Campaign No. : NHTSA ID & CA DMV Campaign Desc. : Inspect 12V and 48V Ground Connections 2023070017 2023070016 2023070018 23V463 (NHTSA) 230717 (CA DMV) 230716 (CA DMV) 230718 (CA DMV) 23P5491108 23P5491109 23P5491110 This is to notify you of the Safety and Emissions Recall Campaign Launch to inspect the 12V and 48V ground connections on 1,552 Model Year (“MY”) 2022-2023 C-Class (206 platform) vehicles. The recall campaign will be visible on the www.NHTSA.gov website and may generate questions from customers. Affected VINs will be flagged in VMI as “OPEN” on August 4, 2023. Background Issue Mercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz vehicles, has determined that on certain Model Year (“MY”) 2022-2023 C-Class (206 platform) vehicles, the 12V and 48V ground connections might not meet current torque specifications. In this case, the wiring harness connector might not be tightened sufficiently which might increase the electric resistance of the connection. As a result, the temperature in this area could increase and a risk of fire cannot be ruled out completely. What We’re Doing MBUSA will conduct a voluntary recall. An authorized Mercedes-Benz dealer will inspect the fastening of the 12V and 48V ground connections and perform repairs, if necessary. Parts The remedy is available and can be performed. Vehicles Affected Vehicle Model Year(s) 2022-2023 Vehicle Model C-Class Vehicle Populations Total Recall Population 1,552 Total Vehicles in Dealer Inventory 13 Given this notice, it is a violation of Federal law for a dealer to sell or lease any new 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 NetStar VMI and Xentry Portal. 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. As a matter of normal service process, please check for other repair measures which might be applicable to the vehicle(s). Additionally, given this notice, it is a violation of Federal Law for car rental companies to rent new vehicles covered by this notification until the vehicle has been repaired. Notice to California Dealers: As required by 13 CCR 2117, a proof of correction (“POC”) certificate showing that the vehicle has been repaired under this recall must be issued by the dealer, and that such a certificate may be required by California as a condition of vehicle re-registration or operation. Please reference this POC in the attached work instructions. Failure to complete this step may result in fines and penalties and lead to customer dissatisfaction. Mercedes-Benz USA, LLC A Mercedes-Benz Group AG Company One Mercedes-Benz Drive Sandy Springs, GA 30328 770.705.0600 News Channel Update | Vehicle Compliance & Analysis Next Steps/Notes Customer Notification Timeline Customer letters will be mailed on or before August 29, 2021. 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. Customer Reimbursement Customer reimbursement is not being offered for this campaign. 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. 2 Campaign No. 2023070016, August 2023 TO: ALL MERCEDES-BENZ CENTERS SUBJECT: Model C-Class (206 platform) Model Year 2022-2023 Inspect 12V and 48V Ground Connections Mercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz vehicles, has determined that on certain Model Year (“MY”) 2022-2023 C-Class (206 platform) vehicles, the 12V and 48V ground connections might not meet current torque specifications. In this case, the wiring harness connector might not be tightened sufficiently which might increase the electric resistance of the connection. As a result, the temperature in this area could increase and a risk of fire cannot be ruled out completely. An authorized Mercedes-Benz dealer will inspect the fastening of the 12V and 48V ground connections and perform repairs, if necessary. Prior to performing this Campaign:  VMI must 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 accordingly.  Please review the entire Campaign bulletin and follow the repair procedure exactly as described. Approximately 1,552 vehicles are affected. Order No. P-RC-2023070016 2 P-RC-2023070016 Inspect 12V and 48V Ground Connections Test Procedure 1 1. Open hood. 2. Remove cover (1, Figure 1). Figure 1, left-hand drive vehicle 3. Check threaded connections of ground points (W106/3, W10, Figure 2) for correct tightening torque.  48 V battery ground point (W106/3) (see BA00.19-P-1039-01O) 16 Nm  On-board electrical system battery ground point (W10) (see BA00.19-P-1012-01O) 16 Nm Figure 2, left-hand drive vehicle a. If torque is not correct: Carry out Test Procedure 2. b. If torque is correct: End measure. 3 P-RC-2023070016 Test Procedure 2 1. Remove dust filter with air duct segment (2, Figure 3). For basic information, see AP83.00-P-8381N (except code 801/802) or AP83.00-P-8381J (with code 801/802). Figure 3, left-hand drive vehicle 2. Remove nut at affected ground point (W106/3, W10, Figure 4). Figure 4, left-hand drive vehicle 3. Remove respective affected cable lug from weld stud. 4. Check respective affected electric line, contact areas, and weld stud for damage. For an examples of the damage profiles, (Figures 5 and 6). a. No damage to the electric line, contact areas, and weld stud: Carry out Work Procedure 1. b. One or both electric line(s), contact areas, and weld stud damaged: Carry out Work Procedure 2. 4 P-RC-2023070016 Figure 5, Example illustration of damage profiles for a 48 V battery ground point (W106/3) Figure 6, Example illustration of damage profiles for an on-board electrical system battery ground point (W10) 5 P-RC-2023070016 Work Procedure 1 1. Replace the respective nut and tighten it to the specified tightening torque. Clean contact point on weld stud  Ground point of 48 V battery (W106/3) (see BA00.19-P-1039-01O) 16 Nm  Ground point of on-board electrical system battery (W10) (see BA00.19-P-1012-01O) 16 Nm 2. Assemble in reverse order. Work Procedure 2 1. Remove the battery of the 48 V on-board electrical system. For basic information, see AR54.10-P-0022WT. 2. Replace damaged weld stud if necessary. For basic information, see AR60.00-P-0100A (part number of weld stud can be found here). 3. If necessary, replace damaged electric line and nut and tighten to the specified tightening torque.  Ground point of 48 V battery (W106/3) (see BA00.19-P-1039-01O) 16 Nm  Ground point of on-board electrical system battery (W10) (see BA00.19-P-1012-01O) 16 Nm 4. Assemble in reverse order. _________________________________________________________________________________________________ Primary Parts Information Qty. Part Name Part Number As required (1) Electric line to W106/3 and W10 (left-hand drive vehicle) * As required (2) Nut, M8 N 000000 008271 * The required electric lines can be found on the basis of the vehicle identification number (FIN) in the XENTRY parts process under main group 54 ELECTRICAL EQUIPMENT AND INSTRUMENTS in picture chart 121, picture number 320. Small parts such as screws, lock nuts, sealing rings, cable ties, fluids, sealant, etc. are not listed in the parts list. The required small parts are taken into account in the budgeting. __________________________________________________________________________________________________ Note: The following allowable labor operation should be used when submitting a warranty claim for this repair: Warranty Information Damage Code Operation Number Description Labor Time (hrs.) 54 911 09 12-1772 Operations: Check torque at ground points in engine compartment 0.2 12-1773 Operations: Perform visual check of affected ground point and line in engine compartment (after check) 0.2 12-1809 Operations: Replace electric line and weld stud at affected ground point (after check) ZM Note: Always check Xentry Operation Time (XOT) for the current OP-Code times. Labor times are subject to change and updates may not be reflected in this document.

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