Convert from GTA Iv by Sleepy93HUN & Danger IV:
http://www.gtainside.com/en/sanandreas/cars/77746-1956-porsche-550a-spyder

3d interior
Steering wheel
Dials
Breaking window

YOU NEED THE ADD ON DLC FROM THE RABBIT :

http://www.gtainside.com/en/gta5/cars/81488-volkswagen-rabbit-1986-addon-bmw-m5-e34-v3

or

https://fr.gta5-hub.com/vehicles/volkswagen-rabbit-1986-addon-bmw-m5-e34-v3


Installation in the readme.txt