Newag 15D/16D is a cargo locomotive (type 15D - PKP ST48 series) or broad gauge (type 16D) diesel locomotive rebuilt by Newag in Nowy Sącz in Poland, which is a deeply modernised SM48 (Soviet TEM2) locomotive.
MY model is fully functional (riding the curved rails and switches). Locomotive has 2 motors, variable lighting. To mount lighting, blocks are drilled.
I hope, this description is helpful. My english is not perfect :)