Reducing Agent Tank, Draining

WARNING: This page is about a different car, the 2015 Volkswagen Beetle. However, it is still accessible from the selected car via links, so may be relevant.

Special tools and workshop equipment required

Adblue®/Urea Recovery Unit VAS 6557

Evacuate

NOTE: The "NO_x reducing agent AUS 32" (AdBlue^® ) is simply called reducing agent in the following information.

WARNING:

The reducing agent can irritate skin, eyes and the respiratory system.
If the fluid comes into contact with skin, rinse the affected area immediately with plenty of water.
If necessary, consult a physician.

NOTE: The reducing agent tank is emptied through the filler neck.

CAUTION:

Make sure the reducing agent does not come into contact with clothing or the vehicle body.

If this occurs, wash immediately with clean water and then dry with a lint-free cotton cloth.

If the reducing agent has already crystallized, use warm water and a sponge.

Reducing agent that is not removed will crystallize and can damage the affected surface.

For information on storage and disposal, refer to Environment Protection → Workshop Disposal! Ask the importer about storage and disposal information that is specific to the country.

WARNING: Danger due to reducing agent leaking out.

To prevent large amounts of reducing agent from leaking out when opening the metering line, wait for the recirculation process to complete, refer to SCR SYSTEM SAFETY PRECAUTIONS .

The reducing agent tank filler opening is located in the luggage compartment to the right behind a cover.

-- Open the fuel filler cap.

Fig 1: Identifying Reducing Agent Tank Cap

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Clean the area around the cap.

-- Open the reducing agent tank cap -1-.

Prepare the Adblue®/Urea Recovery Unit VAS 6557 as follows:

-- Close shut-off valves -A-, -B- and -C-.

Fig 2: AdBlue(R)/Urea Recovery Unit VAS 6557

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Connect the coupling -D- with the shut-off valve -A- connection.

Fig 3: Connecting Coupling To Connection On Shut Off Valve

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Apply compressed air with a pressure hose.

-- Open the shut-off valve -A-.

This creates a vacuum in the Adblue®/Urea Recovery Unit VAS 6557.

-- Close the shut-off valve -A- as soon as the pressure gauge indicates a vacuum 0.8 bar (11.6 psi).

-- Separate the coupling -D- from the shut-off valve -A- connection.

Fig 4: Connecting Coupling To Connection On Shut Off Valve

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Stop the flow of compressed air to the compressed air hose.

-- Guide the hose -E- into the filler neck and all the way to the bottom of the reducing agent tank.

Fig 5: AdBlue(R)/Urea Recovery Unit VAS 6557

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Open the shut-off valve -B-.

NOTE: The vacuum in the Adblue®/Urea Recovery Unit VAS 6557 extracts the reducing agent from the tank. The Adblue®/Urea Recovery Unit VAS 6557 holds 11 liters. When this quantity is drained, it is possible to remove the reducing agent tank. Repeat the procedure if the reducing agent tank contains more reducing agent than that and it must be emptied completely.

-- To empty the Adblue®/Urea Recovery Unit VAS 6557, hold the connection on the shut-off valve -C- over a suitable container and open the shut-off valves -A- and -C-.

CAUTION: Do not reuse extracted reducing agent. For information on storage and disposal, refer to Environment Protection → Workshop Disposal! Ask the importer about storage and disposal information that is specific to the country.

-- Flush the Adblue®/Urea Recovery Unit VAS 6557 thoroughly with water after completing the procedure.