What is aux-in system in car stereo & how it works and also how to protect car's paint from scratches?

Aux is where you plug in your I-pod, at least on my car.


Wax, good quality wax, every six month or less. Also be careful to rinse all loose dirt and mud off before washing. Or find a good no-touch car wash. Deionized water to rinse is best if they offer it at the car wash. Park in a garage or coverd car port.