I just bought a used 06 c230 about two weeks ago, it has 46k miles on it so it's relatively new. Anyways, when I put my foot on the gas (fairly heavily) it takes 2-3 seconds and then I get a sudden burst of acceleration, I don't get it right away. And this morning when I was backing out ov my garage it felt like the gas pedal was pushing itself down, I don't know if these two problems are interrelated but any help would be greatly appreciated.