Audi a2 3l 1.2tdi not engaging clutch

Hi everyone, i am from the netherlands and, seeing the experience you have with these cars, i thought to ask my question here. Im familiar with vw/audi electrics but this is my first a2 and this gearbox is in a league of its own..

Three days ago my Audi A2 3L 2001 (ANY), -without anynoise- disengaged its clutch and refused to select any gears again. It drove and shifted fine before... It would ony start in N and wont allow any throttle in D/E. I couldnt hear the gear selectors do their work anymore

Using elsa and my multimeter i did some checks to exclude some things.

Under the car

No obvious leaks, no play on the gangsteller, all wires and connectors look proper.

Fault codes

None, i checked multiple times. Not the f...