Dear Fiatians, i am having a 40 day old Linea classic with 1.4L FIRE petrol engine under the hood. my car engine was real hushed, and without any sound coming out from the engine when the car was under 500kms. however post 500 plus kms on the odometer, my car engine has a strange hum/ sound when the car engine is cranked and the car is in 1st gear, and doesnt go away unless the car is put on 2nd gear and in motion. is there any serious issue? should the car be taken to service center? thanks and regards.