Mercedes Benz

 Mercedes Benz E 550 4MATIC Sedan Technical Service Bulletin # LI54-21_P-0482412 Date: 100107 Computer/Controls - 'Backup Battery Fault' Displayed WHITE WARNING MESSAGE FOR BACKUP BATTERY Topic number LI54.21-P-048241 Version 2 Design group 54.21 Control modules/modules Date 01-07-2010 Validity Model series 212 up to VIN A092538 (production date 10.09.2009) with SA code 427 Reason for change Service Campaign Initiated Reason for block Complaint: The message "Backup battery fault" appears in the display. The internal resistance specified value stored in the SAM is too low. The additional battery is thus found to be defective during the test by the SAM even though the additional battery is still OK. Cause: Diagnosis limits for internal resistance stored in SAM are too low. 2010 Mercedes Benz E 550 4MATIC Sedan (212.090) V8-5.5L (273.970)   Page 323 Remedy: As of January 8, 2010, this LI must not be performed on the following vehicles: Model 212 - Ser...