The best accredited schools in Germany are:
Mannheim Business School (Triple accreditation: AACSB, EQUIS and AMBA)
min. GMAT score of 600
Stage 1 application by: December 31
Stage 2 application by: April 30
Stage 3 application by: June 30
* Complete applications by December 31 (stage 1) will result in a reduction of tuition fees by 2,000 €
** Complete applications by April 30 (stage 2) will result in a reduction of tuition fees by 1,000 €
WHU - Otto Beisheim School of Management (Equis accredited, application for AACSB accreditation).
This is the school from which most German internet entrepreneurs graduate from (for example: Zalando, Citydeal etc)
GMAT minimum of 600
The program starts March first every year. Applications are possible during the whole year. As applications are reviewed and evaluated on a rolling basis and seats are limited, candidates are encouraged to apply as early as possible.
HHL - Leipzig Graduate School of Management (AACSB accredited):
GMAT minimum 550 - the average is 610
application deadline: non EU citizens - April 1st, EU citizens July 1st
If you include German speaking Switzerland, I would also have a look at St. Gallen.
Best of luck
Editor - Accredited MBA Programs