One of the least HDR HDRs I've ever seen. So much so that I don't get it (and I won't get started on the whole driveway/ cement mixer thing you've got going on).
To make the effort of HDR worthwhile I'd expect to see much more detail in the shadow - places like lower front grille and tyre treads. As it is I just see emphasised reflections in the car's side. You've tried to take the whole rest of the image to mono but there's patches like the eaves frontage and the drive either side of the car where strange tones seem to be seeping in.
On the plus side - the car's nice and sharp.