My 2005 Tl with 36 thousand miles on it idels a little bit rough with the ac turned off but not to the point i would complain altough it could be smoother. But turning on the AC it seems that it puts so much strain on the car that it really increases that shaking and when trying to park it feels like she starts choking a little. The Rpms start to dipp and rise.... what can be causing this ???

 

Same symptoms here on my 06 with 140K. If I find the solution Ill be sure to post back.