'07 Battery Drain Issue

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Lethbridge
#1
Hi all,
I own a 2007 G500 and had about a two month window at the beginning of ownership where everything was fine. However, one day at work, I needed to boost a dead battery. I thought maybe I had left something on that drained the battery. I didn't give it a second thought until it happened the next day as well. That was the beginning of a very long struggle to find answers. There is no MB mechanic in my area and so I've had to do a lot of searching on my own. I've pulled all fuses and found no parasitic drain from anything. The last step was the voltage regulator or alternator that several people said was probably the issue so I changed them both. Still nothing. The voltmeter still shows a large drain... thoughts?

Thanks in advance.
Alf.
 


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