Originally Posted by
Zaphod
However, getting from MUC to Munich central station shouldn't be a problem - there's a suburban train ("S-Bahn", line S 1) every 20 minutes. Thus, connecting times in Munich central are not a problem either; just take an earlier S-Bahn.
If he wants to go to Munich central station he can take whichever train leaves first. Either S1 or S8. Travel time is about the same on either line.
He can also catch the Vienna trains at Ostbahnhof. In that case taking the S8 is quicker.