The past 4 years of ownership of my e55 and 12k miles put on it, not a single issue... couple oil changes. Upper ball joints and motor/trans mount for maintenance items. Total spent 4-500$ in that time and now at 88k miles. I'm nothing less than impressed with this car. With that said I would never daily drive one mainly due to having to wash the car all the time haha. Just have to dust it off before I take it out of the garage.