Hello, I have a 144 ps, 2.5 gasoline/automatic of 96 with 180000 km and a big problem. The engine runs in empty run a bit unround, it vibrates in time and in between it sounds as if it is going out, but it lives up again and vibrates in this moment. this between vibrating you notice clearly in the inside room and annoyed. Speed is however constant and does not wobble, whereby I think that the even in the warm state is a little too high and maybe it helps to find fault, which lies between 900 and 1000 rpm! Otherwise the car drives well and you have no problems, top speed 196 km/h with automatic, consumption always around 10 liters, also on the highway with 160 km/h cruising speed. Made: Oil trap cleaned, hoses renewed from the oil trap, vacuum hoses renewed, hoses of the intake tract renewed, Drosel flap cleaned, Kat New, end pot New! Furthermore I have a question: at exactly 2000 rpm br Is my car really loud, but only at 2000, under and above it is quiet, can it lie on the new cat or is something else defective? Greetings