Hi all im new here and hopefully purchasing my first AMG mercedes soon. Its an 06 E63 and I just have one little and im hoping someone can put my mind at ease. Ive read all sorts of horror storys about cam/tappet failure so im trying to make sure im not about to buy a bad car. The one im looking at does have an audible tappet sound although nothing like the horror vids ive seen on youtube. You cant hear it from inside the car but it is audible from outside. Its not very loud but it is there. A friend of mine tells me its perfectly normal but i just wondered if anyone here has any input as I really am not fimiliar with these engines. Its covered 97000 miles. Any advice would be greatly appreciated. Thanks in advance.