No offence.
But you are showing your age.
I am only a year older but seriously ... >_> ...
You need to approach this from a more matured manner.
Go to consumer tribunal, have an open forum discussion with your sa.
Potentially send a more mature email to BMW Germany.
Writing a feedback form, and swearing ?
Really ?
You do know that its not going to get you anywhere right ?
Take a chill pill, evaluate your options and for goodness sake, write like an adult.
You will be amazed at the difference, when you are calm and composed.
I was like you when I was younger. But I have learnt, that the best way to get shit done is be calm.