One problem related to other fuel system has been reported for the 2013 Audi A4. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2013 Audi A4 based on all problems reported for the 2013 A4.
My car started to smell like gas inside, and it was a very strong odor. I went to an auozone to get a diagnostic, in the system it had said it was a very small gas leak and that it would have been okay to drive. I kept driving and it still smelled like gasoline and stronger each time. Therefore, I took it to the mechanic the next day driving it, and under the back seats was filled with gasoline. The mechanic still cant find the leak. However, if I would have kept driving it, the car could have exploded on me.