I bought an A4 1.8T about 3 weeks ago. I noticed it doesnt idle as an Audi should. Last week i noticed the ESP light would come on sometimes, after restarting the car it would be as normal. The other day the car started shaking which was undriveable. I had to get coil pack changed from Audi service centre. They only changed one coil pack. My question is if i change the other 3 will this make car idle and drive as it should as currently it jerks and isnt as smooth as id expect. Secondly the ESP light is that cause by the MAF and does this have anything to do with the jerking. Help would be apprecited.