Mercedes Benz

Engine - Induction System Testing/Equipment SI M 11 04 07 Engine August 2007 Technical Service This Service Information bulletin supersedes S.I. M11 04 07 dated May 2007. [NEW] designates changes to this revision SUBJECT Testing Induction Systems Using the VACUTEC(R) Smoke Machine MODEL All Models SITUATION Testing induction systems for vacuum leaks is very difficult at times. This Service Information Bulletin is designed to express some testing hints to help simplify the process. First, determine if the vehicle has a condition where the induction system could be leaking. Does the vehicle have adaptation faults? Does the vehicle have oxygen sensor trimming faults? What are the adaptation values; are they positive or negative? In cases where the adaptations indicate a lean condition (positive value), a smoke machine is a helpful tool in determining if the induction system has a leak. Recently, the VACUTEC(R) Smoke Machine [NEW] 625-522B has been added to the Equipment Program. Orders fo...