Reducing Agent Delivery Line, Disconnecting, Version 3:
WARNING: This page is about a different car, the 2015 Volkswagen Golf. However, it is still accessible from the selected car via links, so may be relevant.
-- Press and hold the locking mechanism -arrows-.
-- Remove the reducing agent line -1-.
-- To catch escaping reducing agent place a clean cloth under the coupling point.
-- Seal all the open lines and connections with clean plugs from the Engine Bung Set:VAS6122 .
-- Clean all components and connections with water and a lint-free cloth.