Where is the 2011 BMW 535i’s battery located?

The sunroof on my Kia Sportage has been acting up lately—sometimes it works, sometimes it doesn’t. It’s only two years old—does Kia’s warranty cover the sunroof?

Are there any decent tuning options out there that I can use for my Pontiac Grand Prix GTP? I don’t know anything about tuning, so I have no idea what a good one might be.

One of my outlets shocks me every time I try to use it. It’s more than just a zap of static electricity; it actually shocks me. A friend of mine suggested that it might be because the outlet has an open ground. How can I check for that?