Hello

Hello everyone my name is Mauricio Enriquez, I'm 22 soon to be 23, well the thing is that my brother gave my dad a 85 mercedez 300d turbo diesel and  my dad says that is running rough, now I don't have any expierence with diesel engines, I have knowledge on rotary engines I own a 88 Mazda Rx-7, I would like to know everything about that car like what class it is any tips, tune ups any information about the car would be great.

Thx

Enriquez.