Found the voltage drain!
It was the trunk light, for some reason, the light is no longer turning off after I close the trunk, I tested the amperage draw again and it was found to be 0.70 Amps. It is enough to drain the battery within 10 days. I have removed the bulb for now and the draw has been eliminated!
Chalk up another one for the maniac! 
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2006 BMW M5 "Heidi" @ 109,000 miles
2005 MBZ C55 AMG "Lorelai" @ 165,000 miles
1991 MBZ 300E "Benzachino II" @ 165,000 miles
1990 MBZ 500SL "Shoshanna" @ 118,000 miles
(On the hunt for a good used M103 engine as of 6/10/23, PM me if you have one to sell!)
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