Common prob for vw/audi. What happened is something wrong with any of the cylinder operation and the car system shutoff the problematic cylinder hence the rattle. No need to wait overnight. Just park tepi and restart car will temporarily solve the prob. EPC light will still on but the rattle/judder will go away. Usually this prob will happen during WOT(max tekan pedal) and during high rpm. Common culprit is the coilpack or spark plug. In modded car community usually they will encourage ppl with tuned car to change coil pack to the red r8 coilpack to prevent this prob.