I wouldn't take that from those two. They are just re-enforcing the auto service racket known as German Auto Service. As some other techs have been quoted in the past: "just pay us all your money and no one will get hurt" Think of it this way...if you try and fail you will have to take it to a shop anyway. If you manage to pull it off on your own just think of the bragging rights! Just in case....does your mom enjoy long walks?