I tried the electrical tape isolating method today. I isolated three connectors with the tape. The fourth one that is the lower connection to the inlet was not isolated because I could not fit my hand in there. Unfortunately the results were not showing any improvement even though it did not misfire. The reason is that temperature today was at least 3 degrees warmer than yesterday so based on my previous experience this temperature difference will be enough to help engine stay out of misfire error.

Here is a video from today after the "electrical tape tuning": https://www.youtube.com/watch?v=0nLpg59xWxE

The car is completely cooled down, it is 3C outside. The valvelift again goes directly to 0,3mm from start up and very rough idle appears. After some time it stabilises at 0,4mm. The value is actually set to 0,5mm in INPA. I checked the value later with warm engine and then it was 0,5 mm like I had programmed it. I really would like to know what is the logic behind the decisions valvetronic is making. For me it seems like when the engine is warm, it will go to the predefined valvelift right away. When engine is around 10 degrees celsius, it will set valve lift to 6mm and keeps it that way for about a minute until the valvelift drops to the set value. When the engine is completely cooled down, it will go directly to the set valvelift, just like with warm engine.

After some driving today I reset all the adaptation values for the engine and set the valve lift to 0,0mm. The idle is fine right now, but when I put gearbox to "D" and hold brake, the idle starts to shake a bit.