After around one minute on idle, rpm is going down slowly and then stop, no light appers before stopping, just like if i turn the key to off... And after that when i trying to start the's start then notting, it can take up to a minute to restart (10 try) and after it's start for real and run very well like notting happened...
The car is 2 years old and 37000 km. Subaru dealer did and update on engine computer but noting change, problem still there...
Can you help me?

2012 Subaru Impreza,how do i turn off the seatbelt buzzer when there not buckeled and someone is in them.has no infermation in cars book.