2015 a4 sputtering worsens with AC on
 

Hi, thanks for reading and any help.
im new to audi
i have a 2015 manual A4 with 53k mile and it sputters a bit at around 1000 to 2000rpms in different gears. This sputtering is noticeably worse when I turn on the AC.

what I done so far:
1. Changed the spark plugs
2. Changed the air filter
3. Cleaned the MAF sensor
4. Checked the throttle body for cleanliness and there was a small amount of oil I believe which I cleaned with a rag
5. No CELs or codes showing
6. Not sure but seem like I’m not getting the gas mileage I should.
7. replaced all four coils.

thanks again
rich