You’ve got to hand it to them. The Germans are consistent, at least.
Germany has withdrawn its four vessels from NATO operations in the Mediterranean because NATO has finally announced that it will support the no-fly zone over Libya by monitoring sea traffic in the region, this to include intercepting any vessels suspected of carrying illegal arms or mercenaries to that country.
Normally Feuer und Flamme (full of enthusiasm) for things like arms embargos (if German arms aren’t involved), the Germans don’t like this particular one because, well, they would actually be involved in it. And worse still, this mission permits the use of force if necessary, something the German navy could never ever bring itself to do, ever. Never. So they’ll pass again, thank you.
Mr Rasmussen at NATO: “All allies are committed to meet their responsibilities under the United Nations resolution to stop the intolerable violence against Libyan civilians.”

This covers it well.
http://www.businessspectator.com.au/bs.nsf/Article/Germany-Japan-nuclear-Libya-Gaddafi-pd20110323-F7VVC?OpenDocument