Hi, I have a question. i have a 2020 golf gti with 2900 kms on it (it was a demo car with 498 kms on it when i bought it). It already shows oil change sign on and it also makes weird noise (like some fan running) from the engine after turn off. The noise continues till 15-20mins after turn off. Is it a major concern? I have an appointment with dealer next week.