Any 80's era Audi 4000 Quattro. It was a self-propelled open electrical circuit combined with miscellaneous short circuits including a self-destructing fuse block and a fuel pump rated at several gallons of fuel between failures. It was also related to the unintended accelerating 5000 Quattro. These cars almost sank the Audi ship and wiped out numerous dealers everywhere. It was a very nice driving and handling family of cars going down the express lane to [censored]. If Audi was not able to reinvent itself and start producing real cars they would certainly not exist, today.