Dispolok was an engine leasing pool run by Siemens for a number of years (it has since been taken over by locomotive leasing company Mitsui Rail Capital Europe - MRCE). These ME26s were engines returned after a deal with Norske Staatsbaner fell through due to reliability problems with the engines. Siemens fixed them up and ran them as part of the Dispolok pool for a while. They have since found new homes with a number of operators, and as of this writing in early 2009 several of them are back in Norway for trials with one of the private freight operators there.
Here two of them are passing what probably is the nicest tower in the area, Rpn in Rheydt Hbf, en route to the Siemens test center at Wildenrath.