I have a new 2017 S4 which has awful acceleration lag especially noticeable when pulling away from a standing start when you need to accelerate reasonably fast into moving traffic on roundabouts etc to the point I believe it could be dangerous, so in turn you have to wait for a larger than normal gap to pull out in, which then annoys those waiting behind you. I cannot make my mind up if it is throttle lag, gearbox lag or clutch lag or a combination.(I would not attribute the issue to turbo lag) It has been back to the dealer twice now re this The dealer acknowledges that there is a lag, but does not know what to do about it other than now saying this is normal, they suggested contact Audi customer service each time who in turn said take it back to the dealer.The dealer then said call Audi customer service again and now report it as gearbox lag which I tried to do but they are not responding to calls or emails. I have since been in a new S5 which has similar engines and gearbox's and also appears to have a similar lag issue.Before this car I owned a 2014 B8 S4 which was really good with no issues at all so I am totally disappointed with this car. Has anyone else noticed this issue with B9 platform Audi's.