{"nhtsa_id":11031590,"type":"warranty_extension","type_name":"Warranty extension","date_added":"2026-04-27","date":"2023-09-06","document_id":"EW-Exhaust Valve Assembly","mfr_campaign":null,"replaces":null,"component":"ENGINE","mfr_system":null,"summary":"This NCU replaces the prior NCU issued on March 10, 2023, and contains clarification on reimbursement timeline and removal of damage codes related to intake valves/guide. In our continuing efforts to assure the proper performance of Mercedes-Benz products and to enhance the satisfaction of our customers, Mercedes-Benz USA, LLC (\"MBUSA\") is extending the warranty coverage on the exhaust valve system in certain Model Year (\"MY\") vehicles listed below as follows: MY 2011: Original New Vehicle Limited Warranty of 4 years / 50,000 miles New Vehicle to 12 years / 120,000 miles (whichever occurs first) MY 2012: Original New Vehicle Limited Warranty of 4 years / 50,000 miles New Vehicle to 11 years / 120,000 miles (whichever occurs first) MY 2013 - MY 2016: Original New Vehicle Limited Warranty of 4 years / 50,000 miles New Vehicle to 10 years / 120,000 miles (whichever occurs first) This extended warranty applies to the following condition that may necessitate the repair or replacement of components related to the exhaust valve assembly (e.g. exhaust valve, cylinder head) related to: •Over time, increased lateral forces may lead to wear in the valve guide and/or seat ring. This issue could potentially cause combustion misfire for cylinder 1 through 8 (right and/or left cylinder head), resulting in an activation of the check engine Malfunction Indicator Lamp (\"MIL\").","document":{"url":"https://static.nhtsa.gov/odi/tsbs/2023/MC-11031590-0001.pdf","alternate_url":"https://static.nhtsa.gov/odi/tsbs/2023/MC-11031590-9999.pdf","confirmed":false},"url":"https://open.wenmarpro.com/bulletins/11031590","components":[{"id":"engine","name":"Engine","parent":null}],"codes":[],"topics":[],"vehicles":[{"make":"MERCEDES-BENZ","model":"AMG E63S","year_from":2013,"year_to":2015,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"AMG G63","year_from":2013,"year_to":2015,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"AMG GLE63","year_from":2016,"year_to":2016,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"AMG ML63","year_from":2012,"year_to":2015,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"AMG S63","year_from":2013,"year_to":2016,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"AMG S63 4MATIC","year_from":2015,"year_to":2016,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"AMG SL63","year_from":2016,"year_to":2016,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"CL550","year_from":2011,"year_to":2014,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"CL63","year_from":2011,"year_to":2014,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"CLS 550","year_from":2016,"year_to":2016,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"CLS 63S","year_from":2016,"year_to":2016,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"CLS550","year_from":2012,"year_to":2015,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"CLS63","year_from":2012,"year_to":2015,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"CLS63S","year_from":2014,"year_to":2015,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"E550","year_from":2012,"year_to":2016,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"E63","year_from":2012,"year_to":2016,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"G63","year_from":2013,"year_to":2015,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"GL450","year_from":2013,"year_to":2016,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"GL550","year_from":2013,"year_to":2016,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"GL63","year_from":2013,"year_to":2016,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"GLE63S","year_from":2016,"year_to":2016,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"ML550","year_from":2012,"year_to":2015,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"S550","year_from":2011,"year_to":2016,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"S63","year_from":2011,"year_to":2012,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"S63","year_from":2014,"year_to":2016,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"SL550","year_from":2013,"year_to":2016,"match":null,"vehicle_ids":[]},{"make":"MERCEDES-BENZ","model":"SL63","year_from":2013,"year_to":2015,"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":[]}