Why so much? I have 16 S 75 with AP1 and mine was 1500 plus taxes without radioI have a 2015 P90D with AP1. I pulled the trigger on the MCU 2 upgrade after the bubbling gauge and center screens started driving me crazy. The gauge screen was so bad the battery, clock, etc on the bottom edge weren't visible at all. On top of a door handle, charge port door and two tail lights I'm at $2800 including tax, 5 days of downtime + a newer (and way nicer) MS 90D loaner car. Can't complain for a car with over 110k miles. My Audi had 10x that in repairs before it hit 70k...