94 S420 RIP 2/8/13 02 ML55AMG, 06 CLS55AMG, 89 Mas. 228, 84 Por. 911 Carrera, 93 Toyota t.t. Supra
I have searched the forum threads for information on this subject and can't seem to loacate any so I'm putting this out there hoping someone can enlighten me on this issue. I have a 2002 ML55 AMG that I purchased in great shape with 50k on it with complete dealer maintenance records. The vehicle is my daily driver and I have been almost obsessive about engine maintenance. I have actually changed the Mobile 1 synthetic oil every 3k with the filter (yep its expensive and yep I'm crazy). Now with 107k on the vehicle the oil is still clear between oil changes and there is no oil use between changes. However on startup there is a distinct tapping coming from under the hood. Engine performance seems unaffected but the tapping is driving me crazy. I have no faith in my dealer so I turn to those I can trust to help me understand the reason for the tapping. Once warm it almost completely goes away and is not noticable (except to an obsessive individual like me). I have owned and worked on Mercedes since the 1960's but am the first to admit the technology is beyond me. Thanks for any help anyone can give me.