This year two of four six-axled electric-loco classes are took out of service (classes 103 and 150). So I took this impression with for six-axled units just for fun in Oberhausen-Osterfeld on 13th of February 2003. There is 151 095, unidentified 151, 155 035 and 155 020 (from left to right).
A few month later I noticed that both class 151 in front shows something special: Automated couplers (not the common type for shunting purposes, which is compatible with the traditionally couplers). To indicate this fact to shunting-personal the triangle stickers are applied on the edges of the locos. What should be pulled by this locos? Have a search for "DBAG_6664346.jpg".

Photo by Arnim v. Herff (arnimvherff@uni-duisburg.de)