Then the S4 wiki need little corection
If you do scale your MAF, you may throw a "MAF too high" code. You'll have to increase:
KFMLDMX - HFM threshhold for B_maxflr diagnosis
MLMAX - maximum airflow
No it does not. Everything is correct.
MLMAX does not trigger any DTC, it is the maximum airflow limit, exactly as written in the wiki.