A8L V8-4.2L (BFM) (2004)
Air Line: Service and Repair
Air Line, Servicing
Pneumatic Level Control System
Air Line, Servicing
Special tools, testers and auxiliary items required
‹› Torque wrench (5-60 Nm) (VAG 1783)
‹› Open end spanner insert AF 10 (VAG 1783/1)
‹› Air hose pliers (VAS 6228)
If the air line is damaged, the damaged area can be replaced.
If the connection leaks, the air line can be shortened by 10 mm and a new connecting piece installed. Refer to => [ Connector Piece, Replacing ]. See:
Service and Repair/Pneumatic Level Control System/Connector Piece, Replacing
‹› The air line between the air supply unit and the solenoid valve block is replaced completely with an original line. Note different versions. Route
the air line between the air supply unit and the solenoid valve block parallel to the wiring harness.
‹› The air line between the left front air spring damper and the solenoid valve block is replaced completely with an original line. Route the air line
between the air supply unit and the solenoid valve block parallel to the wiring harness.
‹› The air line between the solenoid valve block and the right front air spring damper is only replaced with an original line in the right wheel housing.
Shorten the original line as needed. On the left side, the line is replaced with parts from the repair kit.
‹› Damaged air lines in the interior are replaced completely with an original line. Route the new air line along the air line/wiring harness. Secure the
new air line at the locations marked. Replace cut cable ties if necessary.
‹› Before disconnecting an air line connection, clean the connection area.
‹› Contaminants entering the lines can lead to system malfunction.
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Clean the connector piece area and corresponding separation point.
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Cut through the air line at a right angle at the connector area using air hose pliers (VAS 6228).
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Remove the connector piece and air line.
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Then mark ends of the air line in the vehicle and both ends of new air line with a waterproof pen.
With 17 mm or 22 mm markings, check whether the connector piece is inserted far enough in the air line.
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Place foam rubber on both lines.