Yes, exactly, the circuit is locked in place with this 90-degree adjuster.
To do this, you need to press the part downwards as described, but not all the way.
Sometimes, there's a rumbling sound somewhere between the bottom and the top.
Unfortunately, it often breaks if you put too much force on it.
So, with feeling.
B.Eng (FH) u. KFZ Meister
Seit 06/10: Audi A4 1,9 TDI Avant Quattro mit AVF.