94 80 0429 113-4 FLIRT 3 of Deutsche Bahn Regio (Region Südwest, Trier) in special livery "Rheinland-Pfalz-Takt". Marked as "The 1000th FLIRT sold" - the FLIRT for Serbia had the same sign, it can only be true for one of them!
InnoTrans, Berlin, 2014-09-23 to 26