I am so glad with this topic ;-)
I had no boost anymore, and the joy for driving was gone, so did not use my E93 335i MHD stage 2+ anymore.
No faults found while reading out , even while driving, just the inlet pressure stationary was about 650mbar, and while driving it was 0mbar.
The vacuumline to the front wastegate was losen by wear ..
Replaced it with a new piece vacuum line, and the car is driving great again..
Thanks for this thread and helpful photo's
Greetings