Audi=No fault code, no idea
Have you run blocks on it to see what the signal level is ?? It could be that the signal is low but then it might be only 1% low and the range could be quite wide. As the low is only exceeded on an intermittent basis you need to see just what the car thinks is too low. As the hesitation is at a constant 2k and the MAF only really comes into its own under excelleration i doubt its your problem but nothing lost in checking it out.
Ibis white Revo S3 and now matching Vivaro LWB HR 2900 :-)
Many people are alive because its illegal to shoot them.