Upvote:5
According to recent news reports, there are actually a few hundred (average about 200, peaks around 400) refugees, which arrive daily by train in Munich. Most of them are coming on trains from Hungary or Italy, from which they can travel freely, since the trains stay within the Schengen area.
Without even considering that there are most likely not so many refugees on the trains from Serbia, since they will be refused during immigration control at the Hungarian border, even a number of 400 per day does not make many refugees per train. There are some 10-15 reasonable daily train connections from Hungary and many more from Italy, so there is no reason to expect that any train is filled up with refugees.