Welcome to the forum and congrats on the car.
1. I don't get any noise from the sunroof (unless it is open of course). Have the dealership check on this.
2. Sure you can change the springs, you might want to consider coilover's as they are adjustable in both height and stiffness.
3. Yes. There are 2 common hacks. Try a search to see the instructions and reviews. One hack is a cut and splice, nothing needed to buy. The other is a system that you can buy and have installed (I installed it myself) and it will unlock all functionality.
4. Not sure what the Z line is. Have the dealership check this out.
5. Someone with more knowledge needs to answer this one. Maybe Discount Tire will chime in on this one.
1. I don't get any noise from the sunroof (unless it is open of course). Have the dealership check on this.
2. Sure you can change the springs, you might want to consider coilover's as they are adjustable in both height and stiffness.
3. Yes. There are 2 common hacks. Try a search to see the instructions and reviews. One hack is a cut and splice, nothing needed to buy. The other is a system that you can buy and have installed (I installed it myself) and it will unlock all functionality.
4. Not sure what the Z line is. Have the dealership check this out.
5. Someone with more knowledge needs to answer this one. Maybe Discount Tire will chime in on this one.