ASR Not Working: Troubleshooting & Fixes

Sure, here is the translation of the text from German to English:

'Hi,'

We have a 2000 Audi A6 sedan with a V6 engine and automatic transmission.

The ABS is working perfectly, but the ASR (Anti-Slip Regulation) has been malfunctioning for a few days; meaning the wheels spin freely when there's an opportunity.
Here's a simple attempt: Engage the parking brake -> put it in 'D' (drive) -> sand on the right, asphalt on the left, and start moving gently... The vehicle completely digs into the right side, and the ASR (Anti-Slip Regulation) light doesn't illuminate!
When the button is pressed, the control panel lights up, but there are no error codes stored in the fault memory.

All wheel speed sensors are providing correct values, and the position of the ASR switch is also being recognized by the control unit.

'Any ideas besides replacing the ABS/ASR unit with a new one that includes an ECU?'

It is known to be located on the control unit; replacing it with a new one restores functionality... unfortunately, this part is not exactly cheap.

Oops, I just started a thread on the same topic, sorry .

I'm also experiencing this problem, but...
The indicator light in my instrument cluster never comes on.
Whether it has buttons or not,
EVEN when starting, not.

What now? Thomas.