nice choice,
My mother had one of these. It's quite special.
The windscreen is nicely modeled, but other areas would be better if they get more polies. These parts are: wheelarches, bumpers, the nose and the rear lights and the panel under the rear lights.
Good luck!
(ps search for 4thfloor on this forum)
other links:
http://forum.rscnet.org/showthread.php?t=189865
http://forum.rscnet.org/showthread.php?t=66073
tip:
you already have some rows on the bonnets. Extend them through the front fender (thus creating more columms there)