diablo2112...I don't know if this helps but this was an install thread of the paddle shifters on an E63...
MP Steering Wheel Installed
I had my 2006 SL65 retrofitted with paddle shifters and it turned out great...I'm not a DIY and it was done by a tuner shop I use...you can PM the tech that did my install...he goes by the handle of "wrench" on mbworld.
He doesn't check on MBWorld.org much but I can tell him to check his PM box if you do PM him...just PM me...lol.
Here is the finished product...the fit and feel of the paddle shifters is excellent.
http://www.mbworld.org/forums/3575961-post1.html