Audi Workshop Service and Repair Manuals

Removing and installing reservoir for reducing agent Special tools and workshop equipment required

t  Special wrench -T50014- Removing Observe safety precautions → Chapter. Observe rules for cleanliness → Chapter. –  Remove active tank for reducing agent → Chapter.

–  Press release tabs -arrows-, unplug electrical connectors -1- and -2- and unclip from bracket.

WARNING Safety risk due to escaping reducing agent. Observe safety measures for handling reducing agent → Chapter.   Note Hold a clean cloth under the separating point to catch escaping reducing agent. –  Press release catches and disconnect return line -1- and supply line -4- → Chapter. –  Move electrical wiring clear. –  Unscrew union nut -3- using special wrench -T50014- and carefully lift off reservoir -2-.   WARNING Safety risk due to escaping reducing agent. Keep in mind that the active tank and the reservoir still contain a little reducing agent. Installing l  Tightening torques → Chapter „Reservoir for reducing agent - exploded view“   Note t  Renew seal. t  Thoroughly clean sealing surfaces for seal.

–  Insert reservoir -2- in active tank; while doing so, carefully slide heating element into active tank through gap between reservoir and installation opening. –  Slip new seal -1- onto reservoir and press it until it makes contact at installation opening. l  The seal must not be twisted. –  Move reservoir into installation position: l  Lug -arrow A- on reservoir must engage in groove -arrow B- on edge of installation opening of active tank.

–  Position union nut -2- so that mark -3- is positioned above the first thread -4-. At this position there is an arrow -1- on the active tank. –  First tighten new union nut by hand and then use special wrench -T50014- to tighten it a total of 5/4 turns (450°).

l  Mark -3- on new union nut -2- and mark -1- (arrow with a line on each side) must be aligned. Remaining installation steps are carried out in reverse sequence; note the following: –  Install active tank for reducing agent → Chapter. –  Adapt learnt value after draining reducing agent or renewing components → Chapter.