Mercedes Benz

Technical Service Bulletin # 610811 Date: 110701 Electrical - Complete Electrical System Power Failure SI B61 08 11 General Electrical Systems July 2011 Technical Service SUBJECT Complete Power Failure of the Vehicle's Electrical System MODEL E82, E88 (1 Series) E89 (Z4) E90, E91, E92, E93 (3 Series) Vehicles produced from 2/28/2007 to 5/30/2011 SITUATION The vehicle electrical system fails completely and one or more of the following faults may occur: ^ The vehicle fails to start. ^ The central locking system fails to operate with the remote key. ^ The key cannot be inserted into the key slot. ^ Communication to the vehicle is not possible using ISTA (Integrated Technical Service Application). CAUSE Over time, the positive battery cable connection at the front power distribution box loses connection. PROCEDURE The situation described in this Service Information can also be attributed to a discharged battery. Before proceeding with this procedure, check that ...