Grant for a car

Hello! Hopefully someone can help me here. I am GDB 50 and can only travel with walking aids (max 100m) or with the Rolli way. I can not work anymore (to 100%). Now it is fortunately the left leg and therefore almost no conversion on the car, “only” automatic needed. I was told years ago that you can also get a grant (height ?) if you are completely EU. That is called “participation in social life” (or so similar). Because suddenly nobody knows that he told me. I would be happy about answers. Thank you!