3.3 How much luggage am I allowed to bring with me? Luggage is limited to two pieces per passenger and may not exceed the dimensions 70 cm x 50 cm x 30 cm. The luggage cannot be transported in the seating area. Foldable buggies may be transported if enough space is available. Oversize luggage cannot be transported.
https://www.bahn.de/en/view/mdb/bahnintern/international/ic_bus/mdb_275494_faq_ic_bus_en_18_07_18.pdf
3.3 How much luggage am I allowed to bring with me?
Luggage is limited to two pieces per passenger and may not exceed the dimensions 70 cm x 50
cm x 30 cm. The luggage cannot be transported in the seating area. Foldable buggies may be
transported if enough space is available.
Oversize luggage cannot be transported.
这句话的意思是,超过尺寸的行李箱,不能携带上巴士,只能安置在大巴的行李舱内……
https://bbs.qyer.com/thread-2894612-1.html