My CT has just tripped 20,000 - it's a 2010, AWD. I've noticed recently that when I slow way down - almost stopped - and then try to accelerate (like when maybe I'm trying to stop at a red light that turns green fast), I feel a definite vibration almost hesitation like the engine can't kick in or it's feeling a little sluggish. I don't think it's coming from the tires. I just had the tires replaced (cupping problems)and the wheels aligned. So, I'm thinking it definitely feels related to the engine somehow. I'm wondering if it always has done this and I'm just now realizing it (what with the cupping issue on a low mileage vehicle - I'm a little gun shy). Thoughts? Same/similar experience? Just live with it? Oh, and under normal acceleration situations, there's no hesitation or sluggishness at all.