seeking any information and help about some concerns i have with my chrysler 300c 05. ive noticed that sometimes when i press on the gas peddle the car take alittle time to respond. also if im on uphill and stop at a light sometimes the car will roll back. and my front end shakes extremely at low speeds. any one who might have some ideas about what might be the causes of this. i would truly aprreciat any advice as to how i might resolve this issues. thank you.