NEGLECTED BMW M5 gets a DEEP CLEAN / No talking / ASMR / Detailing [4K]

Since I bought my BMW F10 M5 last year, I have not had the time to properly clean it and then it got parked in the garage for the winter.
Now is the time to give it some well needed attention :)
WARNING - I'm not a detailer, don't follow what I do - I am likely doing it wrong :D