The two trains were Stadler 3 multiple-units, operated under the Meridian brand by the Bayerische Oberlandbahn (BOB), a subsidiary of Transdev Germany [REF].
The eastbound and westbound trains were scheduled to pass each other at Kolbermoor railway station, with the westbound train () towards the direction of Munich timetabled to wait for five minutes for the eastbound train from Munich () to arrive [REF].