Check engine light came up, my mechanic says that is
#7
Check this site out, plug in your MY and engine code, then........
select diagnostic codes and it will show you an explaination<ul><li><a href="http://www.ebahn.com/AUDI/A/A3/TT/">http://www.ebahn.com/AUDI/A/A3/TT/</a</li></ul>