Clicking Noises??

I have a 2002 Focus and it just got repaired for brake problems and check engine light fixed, well since it was "fixed" there are now clicking noises by the drivers side near the fuse box. It would only click when the car was stopped, but now it is clicking when the car is moving, also the fuel gauge would flicker from half to full and go back and forth, and then when I turned off the car it went back to what the gas was....I am going to take it in today, but I thought I would hear others ideas of what it could be before going.
Thanks