I changed mine a few hours ago and I too agree, this is one of the easiest vehicles to change the oil in next to my wife's MDX (only because you don't have to jack it up). Of course you need the correct tools and information which is what I found confusing. The tools required are simple but the info seems to go all over. What I found is the drain plugs are 12x1.5 (thread size) and use a 6mm allen to remove them. I have attached a pic of mine; what may be confusing some people is the rounded corners to ensure the allen fully seats to help prevent stripping. A T40 fits too but it really looks like the allen is correct since the allen fully seats and the T40 does not. The corners are rounded similar to SnapOn flank drive sockets. The torque value is 25nm, not 18 as some have posted.
2011 E92 M3 Mineral White, DCT, ZCP, Premium, EPS
Last edited by TheGulf1; 09-15-2013 at 02:37 PM.