Exhaust System, Checking For Leaks
WARNING: This page is about a different car, the 2009 Audi TT and 2008 Audi TT. However, it is still accessible from the selected car via links, so may be relevant.
-- Start engine and run at idle speed.
-- Seal tailpipe with cloths or plug for the duration of the leak test.
-- Check for leaks by listening at connection areas of cylinder head/exhaust manifold, exhaust manifold/front exhaust pipe etc.
-- Repair detected leaks.