If you own a Mercedes you did not get it cheap. Models like the Benz AMG, E320, E420 and others are of high quality. So when the car gets a few years old and parts start to wear down you may want to replace them with new ones in order to keep your car running at the same high standards as it did when you first bought it. However, you can use Mercedes Benz used parts rather than new ones to keep the car running at a high quality. Used parts like a car stereo even can make the financial burden of your car cheaper each and every year.