It depends on in which month you make the trip. If in July, you can only take the train, it takes 9 hours, you'll change once in Frankfurt and costs 39 Euro pro person at least. But the offer contigent is limited, no one can garantee you to get the tickets. So good luck.
我去年坐的时候是114欧一个人,来回的,有Student enAusweis的
我还想问下现在德国都有哪些城市有去巴黎的夜车