w211 dual battery system PDF

A documentation that covers the W211 dual battery system in Mercedes-Benz vehicles, detailing the components and functions of both the systems battery and auxiliary battery. The document provides insights into the power distribution with pre-fuse diagram and locations. It describes the dual battery's operation modes, including normal and failure modes. Specifics about the battery construction, such as the use of Absorbent Glass Mat (AGM) technology, are discussed alongside its benefits, including longer lifespan and fast recharge. The instructions on testing procedures using new equipment, such as the Midtronics MCR 717 tester, are also included.