BenzWorld Junior Member
Date registered: Mar 2019
Vehicle: 2008 E350 4Matic
Mentioned: 0 Post(s)
Quoted: 3 Post(s)
Crazy Battery Drain! Please help
So I have a bad battery drain, typically overnight. Fuses #3, 6, 9, 29, 31, 33, 34, 41, and 42 are drawing power after the car attempts to sleep! 33 and 34 I am not too worried about as they seem to be the power seat control module, so I assume I can rewire them to ACC on only or something similar that can be found on here.
3 - navigation/TPMS/
6 - AGW
9 - Overhead control panel control unit
29 - Steering column module/ EIS control unit
31 - Upper control panel control unit
41 - Central Gateway Control Unit
42 - ME-SFI/ Driver side SAM control unit
So I am thinking it has to do with the radio/AGW/Headunit perhaps being bad?
They also seem to cycle on and off. #29 and #41 are the highest draw at .11
Any way to definitively test units one by one or does anyone have any insight or ideas?
Thanks in advance!