M156 tuning help

Looking to tune my 2012 c63. Wouldn?t mind some extra crackles and pops on decel. I tuned it before in the past using hp tuners but just some basic stuff. I can?t seem to find any of the older posts I found back when I originally played with a tune on the car. Would anyone be willing to share some information/secrets on what to adjust for good safe power and some extra crackles/pops on decel? I would sincerely appreciate it if so. Running 91 octane as that?s the best I can get where I am. Car is catless so I?m not worried about damaging them. Thanks in advance for any help!