so:
- reflection on the side window is wrong to me
- really strange is the refection under doors. something wrong is with this too
- i think side of car has ugly "dead" color. add some more reflections (for example stripes from road, maybe some railing in the distance - make it more live)
- in this type of project i propose You to make bg more atractive, or more climatic. because now it ruining all work.