I'll give the usual precaution against driving immediately after a a trans-Atlantic flight (unless your flight comes from somewhere else in Europe).
If you have no business within the city of Munich itself, try to avoid driving through or near it. Driving in most German cities is surprisingly easy, but Munich, along with Stuttgart, are two big exceptions. Munich has some outer beltway roads that allow you to bypass the city, but unfortunately, the southern portion is incomplete, and you need to drive through the city for points further south.
I might suggest following the outer ring (A99) to A96 towards Landsberg am Lech, then take B17 towards Halblech. You'll avoid some of the worst Munich traffic this way.