I accomplish this by ensuring the camera is powered off, then throwing the lens into manual focus and focusing it to MFD, then back to auto focusing, turning the camera off, and detaching the lens (if i'm removing it). Seems there could be a better way of accomplishing this.
HOWEVER, if that's my only (mechanical) complaint about the lens, then I'd say that's a +1 for purchasing it.
Why do you switch from AF to MF and back? The 85L has full time manual focus, you just need to spin the focus ring to retract the front element before powering off the camera.
Love my 85L. It does focus faster on my 1D X than on my previous non-1-series bodies.