I wonder if the tapping noise that you are referring to is the direct injection high pressure fuel pump.
Most Direct Injection engines have a loud tapping sound, almost sounds like a diesel engine.
I would fill it up with premium fuel (93) and see if at least the tapping sound isn't quite so loud.
Just leased a 2015 Sport AWD 401A, pretty much loaded. Pano, 21's, etc..
$1300 down
$475 a month
3 years 36,000 miles.
NJ.
I went and bought a Costco membership for $50 and under the Costco Auto program you get the car for MSRP which was $3500 off.