Hello everyone, this evening my friend was driving my A4 around with me seated next to him. He noticed a clicking noise and suggested something along the lines of getting the CV joints checked/greased, etc. He sounded concerned because he said that it can result in a serious axle failure which scared me since my A4 is not so old. He offered me some help but i had to get home quick so came back. Might not see him this week since he will be in Abu Dhabi ... which also means that i might not have any support in terms of my CV joints ... What are CV joints and what should I do? just grease them?