Car: 2013 Audi A4 2.0 4-Cyl Turbocharged AWD Mileage: 71,457 miles Video Clip: https://youtu.be/HX1wXk84wq8
The car is exhibiting a tapping noise when the engine is under load at lower RPMs. Test drove the car for about an hour and here are some of the things that I have observed...
Sound comes ON: * When accelerating from a stop or a roll in tiptronic(manual) or "D/S" mode where the RPM is allowed to rise to about 3000 RPM * Medium to heavy acceleration from a stop or roll up to 3000 RPM * Most of the time (8/10) with the above conditions
Sound OFF: * When idling * When revving in "P" or "N" * When cruising * When accelerating in "D/S" with a light foot where the car shifts at around 2000 RPM