purchased a 2007 mazda 6 in mid april - 33,000 miles. after about a week on the road i noticed the car is really creaky in the front end. took it to the dealership, they test drove it and didnt find any isssues. car is still doing this ... taking it in on saturday .. but im afraid its not going to do it again .. im a girl so i dont want to seem clueless when i go in .. every passenger notices it as well as my daughter. it is really really loud. im hoping its safe to drive ... can anyone help ?