<https://www.vwvortex.com/threads/very-fast-tapping-sound.2314693/>
<http://schema.org/articleSection>
"2.0T FSI, TSI, and TFSI (EA113) Engine Forum"
<https://www.vwvortex.com/threads/very-fast-tapping-sound.2314693/page-2#post-26758646>