AFN: Rough Idle - Troubleshooting & Fixes

It drives normally, has full power, starts perfectly, and has no issues whatsoever.
"But when I press the clutch to approach a traffic light, I experience an uneven idle. It usually goes away immediately, lasting only a fraction of a second. However, today it just stayed on. Giving it gas while stationary didn't help; the engine revved normally, but then went back to an uneven idle. I then turned the air conditioning on and off, and it went away. When the air conditioning is turned on, there's a slight increase in the idle speed."

What could that be? No errors in the control panel.

/viewtopic.php?t=165&highlight=unstable+idle

Oh, right, I've read that before, but I didn't have the Audi yet at that time.

Will shifting the lid slightly affect the consumption?