Improperly Secured Electrical Wiring Harness – 2022-2023 Mercedes-Benz SL55 & SL63

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 23V-676 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Mercedes-Benz USA, LLC Submission Date : OCT 06, 2023 NHTSA Recall No. : 23V-676 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 : 5,326 Estimated percentage with defect : 100 % Vehicle Information : Vehicle 1 : 2022-2023 Mercedes-Benz AMG SL55 Vehicle Type : LIGHT VEHICLES Body Style : 2-DOOR Power Train : GAS Descriptive Information : Mercedes-Benz 2022-2023 AMG SL-Class 2,567 Vehicles The recall population was determined through production records. Production Dates : JUN 04, 2021 – AUG 09, 2023 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 2 : 2022-2023 Mercedes-Benz AMG SL63 Vehicle Type : LIGHT VEHICLES Body Style : 2-DOOR Power Train : GAS Descriptive Information : Mercedes-Benz 2022-2023 AMG SL-Class 2,759 Vehicles The recall population was determined through production records. Production Dates : JUN 04, 2021 – AUG 09, 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 SL (232 platform) vehicles with the M177 engine, the routing of the 12V-starter/alternator wiring harness might not meet specifications. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : On potentially affected vehicles, the wiring harness might contact the drive Part 573 Safety Recall Report 23V-676 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Description of the Safety Risk : shaft and chafe, which may consequently result in a short circuit. A loss of propulsion cannot be ruled out. This might increase the risk of a crash. Additionally, due to the high electrical currents potentially flowing through this wiring harness, the temperature in this area might increase. Therefore, a risk of fire cannot be ruled out. Description of the Cause : Due to an insufficiently secured clip, the wiring harness might not be routed as required. The issue described is not caused by a supplier. Identification of Any Warning that can Occur : The driver will not receive a warning due to the nature of the failure mechanism. Involved Components : Component Name 1 : ELECTRICAL WIRING HARNES Component Description : Busbar to starter and alternator Component Part Number : A2325401019 Supplier Identification : Component Manufacturer Name : Mercedes-Benz AG Address : NR Foreign States Country : Germany Chronology : In November 2022, MBAG became aware of an isolated case outside the US in which a customer alleged a loss of propulsion. It was found in this isolated field case that the wiring harness of the 12V-starter/alternator was damaged due to chafing on the drive shaft. Since there were no other cases of a similar nature known nor detected, the field case was concluded to be a single occurrence during vehicle production. In late August 2023, MBAG learned of additional field cases and together with its supplier, immediately initiated investigations regarding the root cause and potential consequences that may result from a damaged wiring harness. In addition, the field data was reviewed to identify possible related field cases and customer reports. On September 29, 2023, MBAG determined that a potential safety risk cannot be ruled out and decided to conduct a recall. MBAG is currently aware of 6 warranty claims and field reports of potentially related cases received on December 7, 2022, February 24, 2023, April 3, 2023, June 23, 2023, July 6, 2023 and August 15, 2023 in the US. Part 573 Safety Recall Report 23V-676 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 MBAG is not aware of any cases of death or injury related to this defect. Description of Remedy : Description of Remedy Program : An authorized Mercedes-Benz dealer will secure the 12V-starter/ alternator wiring harness on the affected vehicles. 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 : Remedy Parts: A0069973590 – Cable Tie Identify How/When Recall Condition was Corrected in Production : A change in how the 12V-starter/alternator wiring harness is secured ensures that this issue can no longer occur from August 30, 2023 onwards. Recall Schedule : Description of Recall Schedule : Dealers will be notified of the pending voluntary recall campaign on October 13, 2023. Owners will be notified of the voluntary recall campaign on or before December 5, 2023.A copy of all communications will be provided when available. Planned Dealer Notification Date : OCT 13, 2023 – NR Planned Owner Notification Date : DEC 05, 2023 – NR * NR – Not Reported

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DATE: October 13, 2023
Recall Campaign Initial Notification

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 Starter/Alternator Wiring Harness MY22-23 SL (232 platform) DATE: October 13, 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 October 13, 2023 Campaign No. : NHTSA ID Campaign Desc. : Inspect 12V Starter/Alternator Wiring Harness TBA 23V676 23P2197640 This is to notify you of the new Recall Campaign to inspect the 12V starter/alternator wiring harness on 5,326 Model Year (“MY”) 2022-2023 SL (232 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 October 13, 2023. Background Issue Mercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz vehicles, has determined that on certain Model Year (“MY”) 2022-2023 SL (232 platform) vehicles with the M177 engine, the routing of the 12V starter/alternator wiring harness might not meet specifications. The wiring harness might contact the drive shaft and chafe, which may result in a short circuit. A loss of propulsion cannot be ruled out which could increase the risk of a crash. Additionally, due to the high electrical currents potentially flowing through this wiring harness, the temperature in this area might increase. Therefore, a risk of fire cannot be ruled out. What We’re Doing MBUSA will conduct a voluntary recall. An authorized Mercedes-Benz dealer will inspect and secure the 12V-starter/alternator wiring harness on the affected vehicles. Parts Remedy is not available at this time. Vehicles Affected Vehicle Model Year(s) 2022-2023 Vehicle Model SL Vehicle Populations Total Recall Population 5,326 Total Vehicles in Dealer Inventory 566 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 December 5, 2023. 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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DATE: November 3, 2023
Recall Campaign Launch Notification

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 Starter/Alternator Wiring Harness MY22-23 SL (232 platform) DATE: November 3, 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 November 3, 2023 Campaign No. : NHTSA ID CA DMV ID Campaign Desc. : Inspect 12V Starter/Alternator Wiring Harness 2023100014 23V676 231014 23P2197640 This is to notify you of the Recall Campaign Launch to inspect the 12V starter/alternator wiring harness on 5,326 Model Year (“MY”) 2022-2023 SL (232 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 November 3, 2023. Background Issue Mercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz vehicles, has determined that on certain Model Year (“MY”) 2022-2023 SL (232 platform) vehicles with the M177 engine, the routing of the 12V starter/alternator wiring harness might not meet specifications. The wiring harness might contact the drive shaft and chafe, which may result in a short circuit. A loss of propulsion cannot be ruled out, which could increase the risk of a crash. Additionally, due to the high electrical currents potentially flowing through this wiring harness, the temperature in this area might increase. Therefore, a risk of fire cannot be ruled out. What We’re Doing MBUSA will conduct a voluntary recall. An authorized Mercedes-Benz dealer will inspect and secure the 12V-starter/alternator wiring harness on the affected vehicles. Parts The remedy is available and can be performed. Vehicles Affected Vehicle Model Year(s) 2022-2023 Vehicle Model SL Vehicle Populations Total Recall Population 5,326 Total Vehicles in Dealer Inventory 543 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 authorized service facility, 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. Next Steps/Notes Customer Notification Timeline Customer letters will be mailed on or before November 17, 2023. 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. 2023100014, November 2023 TO: ALL MERCEDES-BENZ CENTERS SUBJECT: Model SL (232 platform) Model Year 2022-2023 Inspect 12V Starter/Alternator Wiring Harness Mercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz vehicles, has determined that on certain Model Year (“MY”) 2022-2023 SL (232 platform) vehicles with the M177 engine, the routing of the 12V starter/alternator wiring harness might not meet specifications. The wiring harness might contact the drive shaft and chafe, which may result in a short circuit. A loss of propulsion cannot be ruled out, which could increase the risk of a crash. Additionally, due to the high electrical currents potentially flowing through this wiring harness, the temperature in this area might increase. Therefore, a risk of fire cannot be ruled out. An authorized Mercedes-Benz dealer will inspect and secure the 12V-starter/alternator wiring harness on the affected vehicles. 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 5,326 vehicles are affected. Order No. P-RC- 2023100014 2 P-RC- 2023100014 Inspect 12V Starter/Alternator Wiring Harness Check Procedure 1. Remove lower rear engine compartment lining For basic information, see AR61.20-P-1105SLY. 2. Check if the 12V starter/alternator wiring harness is too close to the propeller shaft and inspect it for damage near the propeller shaft (A, Figure 1). Figure 1: Inspect starter/alternator wiring harness near propeller shaft (arrow A), direction of travel (arrow B) a. Starter/alternator wiring harness not damaged, carry out Work Procedure 1. b. Starter/alternator wiring harness damaged, carry out Work Procedure 2. 3 P-RC- 2023100014 Work Procedure 1 1. If the starter/alternator wiring harness is not damaged, install an additional cable tie (1, Figure 2) in area near the propeller shaft at approx. 40 mm (dimension c, Figure 2) above the bracket (2, Figure 2). Figure 2: Install cable tie on starter/alternator wiring harness 2. Assemble in reverse order. Work Procedure 2 1. If the starter/alternator wiring harness is damaged, open a TIPS case. Create high quality pictures and align on the repair procedure via TIPS case. Submit TIPS case to GSP/TPB with the reference Code 23P1595002. 2. Assemble in reverse order. 4 P-RC- 2023100014 __________________________________________________________________________________________________ Primary Parts Information Qty. Part Name Part Number 1 Cable tie A 006 997 35 90 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.) 15 950 02 12-1891 Operations: Inspect 12V starter/alternator wiring harness for damage Includes: Remove/install lower rear engine compartment lining 0.3 12-1892 Operations: Install cable tie on 12V starter/alternator wiring harness (after inspection) 0.1 02-2186 Operations: Create TIPS case 0.2 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. __________________________________________________________________________________________________ The following step applies to California dealers only. Apply Proof of Correction Label (A 000 584 54 13) to area identified in Figure 1. Fill in the blank areas of the label. The campaign number for the California Proof of Correction is unique and must be entered as such (231014), your dealer code, and the date of the repair, using a black permanent marker. Note: Clean bonding surface prior to affixing label. Figure 1 5 P-RC- 2023100014 The following step applies to California dealers only. Provide the owner with the completed and signed Proof of Correction Certificate (A 000 584 42 14) (Figure 2), after you scan a completed form and attach to the RO. The recall number for the California Proof of Correction is unique and must be entered as such (231014). Figure 2 California Proof of Correction Parts Information Qty. Part Name Part Number 1 Sheet (CA Dealers Only) A 000 584 42 14 1 Label (CA Dealers Only) A 000 584 54 13 Warranty Information (California dealers please submit under a separate claim) Damage Code Operation Number Description Labor Time (hrs.) 212CA 00 02-0001 Apply Proof of Correction Label and completed Proof of Correction Certificate 0.1

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