IS 220d

Hello Lexus municipality, after 30 years Opel, I get on an IS 220d next week, I am a little skeptical already, because of the space offered it is small, and the driving comfort ??? I had the Toyo exchanged for Bridgestone, I hope a good decision. Has someone with it experience. Consumption, let me be surprised. Is there experience with organic diesel?? Lexus says no, but I don’t think that is so relevant, because they secure themselves to all sides. sse can I drive??? What about a Power Box?? Experience values??? Thank you in advance, omega7 If everything fits, I change the name