Ok, so far I have done the following:

1. exchanged coil one and coil two positions
2. cleaned the reusable air filter
3. cleared all the codes
4. cleared all the adaptations through INPA
5. configured the obdlink bluetooth to record all kinds of data for my test drive

I will drive around some and report what happens next.

I watched a couple of videos on compression tests, I'll need to rent/buy some gauges to do that.

Thank you all for your help so far! :-)

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2001 BMW X5 3.0i, Automatic, Gasoline