Mercedes Benz S 550 4MATIC Technical Problem #S-01_20-32A Date: 120103 Engine - Cylinder Head Cover Leak Information
Mercedes Benz S 550 4MATIC Technical Problem #S-01_20-32A Date: 120103 Engine - Cylinder Head Cover Leak Information Date: January 3, 2012 Order No.: S-B-01.20/32a Supersedes: S-B-01.20/32, April 2, 2010 Group: 01 Revision a: Star Diagnosis video information and revised text. SUBJECT: All Models with M272 and M273 Engines Cylinder Head Cover Leaks 2010 Mercedes Benz S 550 4MATIC (221.186) V8-5.5L (273.968) Page 83 Field inspections of suspected cylinder head cover oil leaks, have revealed that unnecessary resealing is being performed where the cylinder head cover is not the root cause of the leak. In cases of customer complaints of oil leakage, it is essential to determine the actual source. A proper remedy should be applied to avoid repeat repairs and unnecessary workshop visits (refer to other publications on the subject). For your convenience, a video has been created which outlines the proper procedure to help identify the source of engine oil leaks. The vid...