What is the the correct preposition in this case? Auf die or in die?
Ich steige auf / in die Buslinie ein.
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Sign up to join this communityWhat is the the correct preposition in this case? Auf die or in die?
Ich steige auf / in die Buslinie ein.
Definitely and only in die.
Auf die Bahn steigen would be maybe correct, if you think of people travelling on trains' roofs in India :)
The preposition you want to use is in. But you cannot use it together with Buslinie and einsteigen.
You can say
in den Bus / in den Bus der Linie 42 / in den 42er (Bus) / in die 42 einsteigen
but not in die Buslinie einsteigen. Maybe you had "Bus der Linie X" in mind when writing you question, but it seems like you accepted @Em1's edit.
As @1Darco11 pointed out in the comments, Buslinie is a general word for all busses on the same route so you can not interact directly with a Buslinie. But you can say
Ich nehme die Buslinie (or short: Linie) 42.
if you want to express that you want to take a bus of that line.
There are some vehicles where auf would be the right choice, like an open trailer (Anhänger), but then the verb to use would be aufsteigen.