I recently purchased a 2014 Audi A4 sedan, automatic, s line package with 29000 miles on it. Now, Im new to the Audi family and this is my first Audi. And I love the car, but I recently noticed that on my way home from work, sitting in traffic, I can feel the car starts to shake or shutter after I slightly press on the gas and then release my foot off the pedal and start to coast until the car slows down or i have to press on the brake to stop before the car in front of me. It really only does this between 950-1500 rpm, specifically 950-1100 rpms. Its not a bad shake/shutter, but it is not smoothe at all, which is kind of annoying. Also, in that stop n go traffic, after I come to a complete stop, and then I press on the gas, the car like jumps into gear..but if i gun it or slowly accelerate, it doesnt happen. this "jump" also happens when Im decelerating and the car rolls to a stop, it "jumps" right around the 1000-1500 rpms and it goes into a lower gear. its not a smoothe transition at all and its no where near what it feels like when the car downshifts in higher gears.

I havent gotten any check engine lights or anything either.

Ive read alot of people posts with sort of the same idea saying that audi told them it was just how the engines/transmissions were built, as well as the turbo and how the car does that to slow down and conserve power or whatever. But there audis were before 2010 so I dont think it can relate to mine.

Now, Im in my early 20s so i was very excited when i was picking up the car when I bought it from the dealer, so I do not know if this was happening at that time or not, which is making me worried.

It seems to happen after the car has been completely warmed up and Ive been driving for more than 10 mins because i never notice it when I drive to work in the morning. And my morning commute is only 10-15 minutes so that short of a period combined with the colder weather from the night/morning I have never noticed it. But since its summer now, and its hot all day, when I go to drive home, it takes me 10 minutes to get to the highway, so the car is easily completely warmed up by the time i get to the highway. then I sit in traffic and it takes me 40 min to get home, which is why i always notice it on the way home.

If you guys have any insight or advice on what to do, it will be very much appreciated. Also, Im not a mechanic or anything and Im just starting to get into how engines/trans etc work, so Im at a basic level when it comes to car knowledge so if you could write you advice with simple terms, it would be alot easier for me to understand.

Thanks guys,
Lukas