2007 model 207 help

Hello friends. I bought a 2007 model 207 1.4 hdi trendy a week ago. If you answer a few questions, it is very acceptable.
1. According to my researches, especially in the 2007 model 207s, torpedo swelling was a chronic problem. I have this problem. Anybody find a permanent solution to this.
2. There is a circle and a rotating place on the ceiling of the glove box, what does it do?
3. Sometimes, when I start the car, the air conditioner operates automatically and does not shut down until it stops. I don't know if it is working or something is wrong with this automatic stuff.

2. When the torpedo cooler turns to one side, the air ducts open when the air conditioner is turned on, the air ducts are closed when turned to one side, the air ducts do not cool the torpedo.