Electrical - Consumer Shutoff Intermittently Active

Mercedes Benz C 250 4MATIC (204.085) (CAN) V6-2.5L (272.911) Technical Service Bulletin # LI54-10_P-051049 Date: 120405

Electrical - Consumer Shutoff Intermittently Active

Consumer shutoff intermittently active

Topic number LI54.10-P-051049

Version 1

Design group 54.10 Battery, voltage supply, voltage converter

Date 04-05-2012

Validity Model series 169, 245, 204, 207, 212, 216, 221 (as of SA code 809)

Reason for change

Complaint:

- Consumer shutoff intermittently active.

- Head unit and/or other consumers are shut off after a short time.

Cause:

The voltage value transmitted by the battery sensor to the rear signal acquisition and actuation module (rear SAM) via the LIN bus is too low,

causing the rear SAM to shut off consumers.

2010 Mercedes Benz C 250 4MATIC (204.085) (CAN) V6-2.5L (272.911) Page 34

Remedy:

Use diagnosis in the SAM to read out the actual voltage value transmitted by the battery sensor to the rear SAM, and compare it with the voltage

measured directly at the battery using a multimeter.

If a difference> 1V is measurable, the battery sensor must be replaced.