Well, I see that at least three German speakers are on this thread.
It should be noted that the German "Bundeswehr" is a purely defensive force - as mandated in the German constitution.
The Bundeswehr was not even intended to be used for any "Auslandseinsätze" (military excursions abroad). Germany, then under the adminstration of Helmut Kohl (CDU) was heavily criticized for not joining George H. W. Bush's "coalition of the willing" in 1991 - but in reality, Germany was sticking strictly to it's constitution.
It took a hell of a lot of wrangling and juggling within the Bundestag and Bundesrat to get this deployment in Afghanistan approved, and most Germans were against it, especially after Gerhard Schröder's (SPD) 2002 election shenanigans.
So, the deployment was according to a timetable. The Germans are deserting no one. They are leaving as was planned from the get-go.