I have a 2014 Smart for 2, I have not driven it in two months, I was going to use it yesterday, however the key-fob did not unlock the vehicle. I changed the battery out with a new one, thinking that was the issue, however it still did not unlock the vehicle. So, my owners manual is in the vehicle which I can not get to for reference. How do I proceed to correct the problem, without involving the dealership? I have not checked the battery yet but intend too.