{"nhtsa_id":11023096,"type":"service_bulletin","type_name":"Service bulletin","date_added":"2025-09-11","date":"2025-09-10","document_id":"LI35.31-P-066469","mfr_campaign":null,"replaces":null,"component":"POWER TRAIN","mfr_system":null,"summary":"Complaint Possible humming noises from the drivetrain in the area of the rear axle, especially during tight cornering in the lower speed range. Remedy Note: Please follow the instructions in this document. The replacement of components (other than those named for processing) is not effective. Remedy: A test drive must be performed. For accurate analysis (localization) of the noise, the \"Steelman Chassis Ear\" noise diagnosis kit can be used, for example. If the rear axle differential is unambiguously identified as the cause (noise source), the oil must be replaced. Observe the following: 1. Warm up the oil in the differential by means of a short test drive. 2. Drain the oil from the differential and fill it with new oil according to the parts list in the attachment. Please follow the procedure described in AR.35.31-P-0523OLC. Note: To ensure that the differential is drained as completely as possible, both rear wheels should be rotated slowly 2-3 turns while draining. Make sure that as little residual oil as possible remains in the differential. 3. Please advise the customer that in isolated cases the problem may continue to occur for another 30 to 60 miles after the oil has been replaced. If the problem is still present after the appropriate mileage: • Double check the appropriate mileage was driven. • Repeat the flushing and filling procedure a second time, make sure to properly flush all the diff fluid out • If no change after the second flush and additional mileage. replace the rear diff","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11023096-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2025/MC-11023096-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11023096","components":[{"id":"powertrain","name":"Transmission and driveline","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"MERCEDES BENZ","model":"C 300 4MATIC","year_from":2018,"year_to":2018,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"AMG C43","year_from":2017,"year_to":2018,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"AMG C63","year_from":2017,"year_to":2018,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"AMG C63S","year_from":2017,"year_to":2018,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"AMG E43","year_from":2018,"year_to":2018,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"AMG E63","year_from":2018,"year_to":2018,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"AMG E63S","year_from":2018,"year_to":2018,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"AMG GLC43","year_from":2017,"year_to":2018,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"AMG GLC63","year_from":2018,"year_to":2018,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"AMG GLC63S","year_from":2018,"year_to":2018,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"AMG S63","year_from":2017,"year_to":2018,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"AMG S65","year_from":2017,"year_to":2018,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"AMG SLC43","year_from":2017,"year_to":2018,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"C 300","year_from":2017,"year_to":2018,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"C 350 E","year_from":2018,"year_to":2018,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"C350","year_from":2017,"year_to":2017,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"C350E","year_from":2017,"year_to":2017,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"E 300","year_from":2018,"year_to":2018,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"E300","year_from":2017,"year_to":2017,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"GLC 300","year_from":2018,"year_to":2018,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"GLC300","year_from":2017,"year_to":2017,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"S 450","year_from":2018,"year_to":2018,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"S 550","year_from":2018,"year_to":2018,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"S550","year_from":2017,"year_to":2017,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"S550 4MATIC","year_from":2017,"year_to":2017,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"S550E","year_from":2017,"year_to":2017,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"S600","year_from":2017,"year_to":2017,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"S650","year_from":2017,"year_to":2017,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"SLC 43 AMG","year_from":2017,"year_to":2017,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"SLC300","year_from":2017,"year_to":2017,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"SLK 350","year_from":2017,"year_to":2017,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-MAYBACH","model":"S 560 4MATIC","year_from":2018,"year_to":2018,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-MAYBACH","model":"S 650","year_from":2018,"year_to":2018,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-MAYBACH","model":"S550","year_from":2017,"year_to":2017,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-MAYBACH","model":"S600","year_from":2017,"year_to":2017,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-MAYBACH","model":"S650","year_from":2017,"year_to":2017,"match":null,"vehicle_ids":[]}],"as_of":"2026-10-19","note":"A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.","attribution":[]}