While cleverly efficient, I'm not sure it's a great idea to run your transmission 3L low on fluid. Maybe it's not an issue, but it seems like it could be. Perhaps someone who's more knowledgeable about transmissions than me could chime in.

AM.

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E70 2010 3.0 M57 AT Titanium Silver with Black Leather
E53 2004 3.0 M54 AT Toledo Blue with Gray Leather
E83 2008 3.0 N52 AT Silver Gray Metallic with Black Vinyl
E46 1999 2.8 M52TU 5MT Black with Tan Leather 250K+ miles (Sold, but not forgotten)