hi in my company there will soon be new vehicles, away from audio a6 avant to v70 d5. now my question, what is useful at volvo and what is unnecessary, because I have never driven a volvo before. I have now chosen the following things: v70 d5 summum bi-xenon dvd navi hanging clutch dachreling phone with freephone rear windows dark saphir black metallic there is something else you need, I have an annual running power of 40,000 to 50,000 km.