Perform Software Update to Air Conditioning Control Unit – 2016-2021 Mercedes-Benz C-Class, E-Class & GLC

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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 and Analysis 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: Emission Service Campaign 2023060003 Notification Perform Software Update to Air Conditioning Control Unit DATE: June 15, 2023 IMPORTANT NEW EMISSION SERVICE CAMPAIGN INFORMATION 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 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 and Analysis Emission Service Campaign Notification June 15, 2023 Campaign No. : Campaign Desc. : Perform Software Update to Air Conditioning Control Unit 2023060003 21P5499508 This is to notify you of an Emission Service Campaign to perform software update to air conditioning control unit on 9,119 Model Year (“MY”) 2016 – 2021 C-Class (205 platform), E-Class (213 platform) and GLC (253 platform) vehicles. The affected vehicles will be visible and flagged in VMI as “OPEN” on June 16, 2023. Background Issue Mercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz, has determined that on certain Model Year (“MY”) 2016 – 2021 C-Class (205 platform), E-Class (213 platform) and GLC (253 platform) vehicles, the air conditioning control unit software may not meet production specifications. There is a possibility that a stuck open thermostat may wrongly be detected causing the check engine Malfunction Indicator Lamp (‘MIL’) to illuminate. What We’re Doing MBUSA will conduct an Emission Service Campaign. An authorized Mercedes-Benz dealer will perform a software update to the air conditioning control unit on the affected vehicles. Parts Parts are not required for this campaign since the remedy is software based Vehicles Affected Vehicle Model Year(s) 2016 – 2021 Vehicle Model C-Class, E-Class and GLC Vehicle Population Total Campaign Population 9,119 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. 2023060003, June 2023 TO: ALL MERCEDES-BENZ CENTERS SUBJECT: Various Models Model Year 2016 – 2021 Perform Software Update to Air Conditioning Control Unit Mercedes-Benz AG (“MBAG”), the manufacturer of Mercedes-Benz, has determined that on certain Model Year (“MY”) 2016 – 2021 C-Class (205 platform), E-Class (213 platform) and GLC (253 platform) vehicles, the air conditioning control unit software may not meet production specifications. There is a possibility that a stuck open thermostat may wrongly be detected causing the check engine Malfunction Indicator Lamp (‘MIL’) to illuminate. An authorized Mercedes-Benz dealer will perform a software update to the Air Conditioning Control Unit 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 9,119 vehicles are affected. Order No. P-SC-2023060003 2 P-SC-2023060003 Perform Software Update to Air Conditioning Control Unit  Always use the latest XENTRY Diagnosis software release with all available add-ons.  Make sure to follow the operation steps exactly as described in XENTRY Diagnosis.  Use a charger to ensure sufficient power supply to the vehicle’s on-board electrical system battery (greater than 12.5 V).  If XENTRY Diagnosis is already connected to the vehicle, start with Work Procedure step 2. If two or more software updates or SCN codings are performed during a single workshop visit, operation items 02-4762 and 02-5058 may be invoiced only on one of the workshop orders. Work Procedure 1. Connect XENTRY Diagnosis. 2. Update automatic air conditioning (AAC) control unit software To do this, select menu item “Quick test view – N22/1- automatic air conditioning (AAC) – Adaptations – Control unit update – Update of control unit software”. Then follow the user guidance in XENTRY Diagnosis. 3. Disconnect XENTRY Diagnosis. __________________________________________________________________________________________________ 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.) 54 995 08 02-9334 Update automatic air conditioning (AAC) control unit software (with XENTRY Diagnosis connected) 0.1 02-4762* Connect/disconnect diagnostic system (XENTRY Diagnosis) 0.1 02-5058* Connect/disconnect starter battery charger (with XENTRY Diagnosis connected) 0.1 * Invoice operation item only once for each workshop order. 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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