LWO(6),
Package includes bitmaps, models (interior and exterior separated into layers) and scene with pivots and parentage so you can rotate wheels - all you have to do is to load object from scene without light sources, all settings should be loaded automaticaly.
You can modify quality of model with Object Properties of selected layer (Geometry -> Render SubPatch Level).
You can also load model without interior and change value of transparency of window glass textures.

Polygon / vertices counts:
subdivision=1 - 117871 / 140048
subdivision=2 - 348307 / 374541
subdivision=3 - 732359 / 762192

MAX(5),
Package includes maps and polygonal model - meshsmooth is applied and set to '1'. Wheels and interior are separated parts.

Polygon / vertices counts:
meshsmooth=0 - 117871 / 140048
meshsmooth=1 - 348307 / 374541
meshsmooth=2 - 732359 / 762192

3DS,
Package includes bitmaps and polygonal model with high, medium and low count of polygons. Wheels are separated parts.

Polygon / vertices counts:
hi-poly - 1466632 / 768717
med-poly -   703192 / 377161
low-poly -   245100 / 139872

OBJ, XSI(3.5)
Package includes bitmaps and polygonal model with high, medium and low count of polygons. Wheels are separated parts.

Polygon / vertices counts:
hi-poly - 732359 / 762192
med-poly - 348307 / 374541
low-poly - 117871 / 140048

Note: the model was made in Lightwave, so other formats may need some work on materials and scale, if you need more information