ED4 (Electric train Demikhovskiy 4-th modification) is a series of Russian electric trainsets, in production since 1996. The trains are produced by DMZ and currently in service on RZD lines in almost every part of the country and former USSR states.
The Volga GAZ-31105 was the last model of the Volga mid-size sedan and was a re-styled and upgraded version of the preceding model Volga GAZ-3110.
This one is also a post-2007 version which differs from the pre-2007 in the grille shape, also has an upgraded interior on which Germany's Hоеrmann Rawema и EDAG also worked, and other things.
For comparison here are some wikipedia Volga GAZ-31105 pre-2007 pictures.