Don't have any direct contacts in Munich at the moment, so can't give any personal referrals.
Like Batman said, Krav has become big business and has splintered into several "factions," some of which use less strict/ethical methods of selection for who will teach their method than others. As such you can find Krav instructors that are good, skilled teachers, and have useful experience to impart to their students; but you can also find Krav instructors who just took a weekend seminar, simply paid the money to get certified to teach, have minimal experience, no real combative skills, no real teaching skills, and therefore teach in ways which dishonestly "prepare" their students for the realities of combat.
If you decide to go with Krav, there are several questions that I would suggest asking the instructor:
1) Who did they get their rank/certification from? (You should be able to fairly easily look up someone's lineage and/or accomplishments)
2) What generation student are they? Generations describe the instructor's separation from the source of the system; for instance I am a Fourth Generation Masaaki Hatsumi student/Black Belt; Third Generation Bruce Lee student; Second Generation Joe Lewis, Bill Wallace (Black Belt), Luigi Mondelli Student; and First Generation Walt Lysak Jr and Richard Ryan student/Black Belt/Certified Instructor.
3) How often do their spar/roll/engage in fully resisted situational training? You can't learn to swim without getting in the pool, and likewise you need to actually start accruing experience dealing with people that are doing everything in their power [within some restrictions or limitations, and with appropriate safety gear, especially at the onset of training] to defeat you if you ever want to gain any kind of true combative skill.
4) At what rank/level do students start engaging in "live" (see above) training? If the answer isn't "immediately"/as soon as possible, then walk away. Unfortunately, in order to appeal to soccer moms, business execs, and other non serious students who are looking for the newest "workout trend" and/or to gain (unfortunately false, but they don't know this) confidence in their "ability" to defend themselves without ever being truly challenged or exposed to the realities of combat, some Krav associations don't introduce real/live training until the student has reached a certain/higher rank/level. This is likely because they realize that most people who start Martial Arts don't last, and that the longer they can hide the realities of their skills from them, the longer they can protect their fragile egos and keep them coming back for more. Don't get me wrong, some will stay even once real/love training is introduced, but they would have stuck around had it been there from the beginning and they are fewer in number.