In this video we show where to jump start a 2008-2016 Audi A4 B8. The positive connection is located under a plastic cover, and the negative is a small metal pole that sticks up to the right of the engine.
In the above video we show how to remove the mass airflow sensor on an Audi A4 B8. Make sure to use the specific cleaner for the MAF. Cleaners that are not made for the MAF can leave a residue causing incorrect readings sent to the ECU.