Audi Repair: Audi A4 3.0 2002, maf sensor, audi a4

Question
Hi Jan, thanks for your time and help on this.  I wanted to check if my MAF sensor was working since my car is trembling when is on Parking and idling.  I didn't have a DTC code for the sensor but when I disconnected the sensor and let it run it did show a DTC for it (P0102 ). But the car kept trembling the same there  was no change on it.  Do you think the sensor should be change?

Answer
It sounds like the MAF is not having an effect when diconnected, so there are two options; either the MAF is not able to rectify the real problem, or the MAF is not working and disconnecting it makes no difference.  I would replace the MAF first to take it out of the equation.  Let me know,  Jan