Hello everyone, finally got an M5! Unfortunately, this happened. I had to drive it home for over 500kilometers mostly highway, was doing 60mph most of the time. Checked the oil seemed ok, but when I got home and standing if front of the car I could hear a slight... rattle or how do I describe it, kind of like a diesel sound to it but not loud, will try to film it today! It's a 07.1999, mileage is allegedly 140k kilometers... I'm the 4th owner now and I'm really scared not to destroy the engine, I only have it for two days. Any advice would be appreciated, sorry if I'm doing something wrong by asking this, but I'm desperate. Could it be the chain tensioner?