The electoral college was recently described in this forum as idiotic by a non-American who, just today, seems to approve election results in Germany where a "winner" is supported by 32.5%. That's pretty idiotic to me, so different strokes for different folks.
Maybe a bit of a misunderstanding.
CDU/CSU at 32.5% is the strongest party.
From that position those parties will present an arrangement to govern.
usually in a coalition with other parties.
The Bundespräsident will present the chancellor candidate of that group
to be voted on.
Next is a parliamentary vote to bring the candidate into office .. or not.
That vote is a majority of seats vote. ( with a fallback to majority of votes only.
i.e. a minority government like we've seen ins Scandinavia is possible. never happened yet. )
After a successfull vote the new chancellor will present a cabinet of ministers.
So if Ms. Merkel gets the job again she is not a 32.5% Chancellor but a 50+% one.
PS: The CDU/CSU thing is a bit strange actually. CSU is only available in Bavaria
while the CDU is active in the remaining 15 Bundesländer.
The CSU like any other party has to clear the 5% hurdle _for the overall vote_.
i.e. if the CSU vote at home drops another couple percent the CDU/CSU game is over.
( That explains why Seehofer was so very busy fishing on the right fringe of voters which seems to have backfired some.)