Loss of reverse and drive and when you turn it off it wont start

What is your question?

The car will run great. Then i can start the car pull it into reverse and it says neutral then pull it to drive and it says nuetral, turn off the car and it wont start. It will sit overnight then it will start and run great then happens again in a day or two.

What makes this problem better or worse?

It seems to happen when i add gas

How long has your 2008 Smart Fortwo had this problem?

A week