Friend of the family bought a Caddy few months ago, recently it had some major issues with it one day. I took a quick look at it and found out that one of the nuts that holds the cables on to the battery post, is a wrong nut to begin with. Thus half the electrical system got fried do to bad contact to battery post. Took dealership 9 days to fix it, they had to replace most of the wirring. 2 days later, head lights are not working. He took it back to find out when the first major repair was done they put in the wrong fuse box. Car spent another 4 days in the shop.