I have recently purchased my 2009 A5 S-line. The engine light just came on, however the car seems to be running perfectly without any seeming issues.

edit*
hooked it up to the diagnostic, shows a throttle error. P0068. manifold absolute pressure sensor(MAP)/mass airflow sensor(MAF)/throttle position correlation.
probably the sensor needs changing but who knows. might have to take it to the mechanic.

Does anyone know a website you would use to get part numbers for audis? e.g. for bmw you would go to realoem.com

 

Took the car to mechanic who connected it to the diagnostics and the following codes came up.

P2070 Intake manifold tuning valve bank 1 stuck open
P307A Intake system airflow too low
P0068 Map/Maf throttle position correlation

I did a bit of research and it appears it might be caused due to carbon build up in the hose connected to the air filter or else leaks.

No one seems to comment, anyone have any ideas?

 

This could be a tough gremlin to diagnose.DO a pressure test on your cylinders. I was having the same issues. I replaced all of the upper gaskets and seals, the ignition coils, plugs, rear engine seals and map sensors. It went away eventually, but I was down 4k in repairs.