I've bath bled mine any it's absolutly awesome! Blew all the oil out first with a track pump, and ran warm water through it for a while to make sure it's clear of any residue oil.
filled up the bath, and done the norm. see "revolvers" guide to a bath bleed.
the only differance with the 2011 magura is you have to unscrew the hose on the lever till 2/3 threads are showing. this opens up the bleed hole.
It did take a while till all the air " bubbles" stopped coming out, I just kept tapping the slaves/ lever to disloge any that coulda been stuck.
Hope you sort it, with a nice bleed they work / feel so nice to use.