C30 D5 bought, a few questions to the experts

Hello LG colleagues! I bought a C30 D5 6-speed today with very good equipment. Add a photohttp://i56.tinypic.com/301emc5.jpg R-design inside, R-design outside, Xenon, Navi, high-performance sound, partial leather seats, etc. The car is 2/2008 and has 31,000 KM mileage. I drove with it today about 300 KM and the car is absolutely great. I have as a driver (197cm tall) more space than in my last S60 D5 (disturbing handbrake on the thigh). Now I have a few questions to the experts and C30 connoisseurs: -Which wheel/tire combi fit the C30 well without having to rub something and you have nothing to change on the vehicle? Currently there are 17 wheels on it, then I will mount my winter tires on it in the fall. For the summer it would be interesting what is going on with the car? -What do I like the “Leder” with the partial leather seats (R-Degin), my brightly don’t have the D?