I recently purchased a 2016 SLK 300 with a 2.0L 4 turbo. I originally purchased it as a semi daily driver for my wife to replace her G37 that I sold. I fell in love with the car and would like to do some performance upgrades. Being as I am new to the MB world I have no experience with these vehicles. Are there any upgrades for this 4cylinder turbo? Hi flow filters, cold air intakes, pulley changes etc. yes I realize that a 4 turbo may not be the best “performance” engine to start with. Are upgrades available? Is it even worth the time,effort and money on the 4 cylinder?