Procedures

Air Pipe Line, Servicing

Special tools, testers and auxiliary items required

• Torque Wrench (V.A.G 1783)

• Open End Spanner Insert AF 10 (V.A.G 1783/1)

• Air Hose Pliers (VAS 6228)

If the air line is damaged, the damaged area can be replaced.

If the connection leaks, air line can be shortened by 10 mm and a new connecting piece installed. Refer to => [ Connector Piece ] Connector Piece.

• The air line between the air supply unit and the solenoid valve block is replaced completely with original line.

• The air line between the solenoid valve and the pressure reservoir is replaced completely with original line.

• If the air lines on the solenoid valve are damaged, then route the separating point inside the vehicle interior (spare wheel well) due to the short lines.

• Clean separation point area before disconnecting air line connector.

• Contaminants entering the lines can lead to system malfunction.

- Clean connector piece area and corresponding separation point.

Separating point overview

- Cut through the air line at a right angle at the connector area using (VAS 6228).

- Remove connector piece and air line.

- Then mark ends of air line in vehicle and both ends of a new air line with a waterproof pen.

With 17 mm or 22 mm markings, check whether connector piece is inserted far enough in the air line.






- Place foam rubber on both lines.

- Install new line connector.

• Connector pieces in line connector are already tightened to proper torque. Air lines only have to be connected.

- Remove transport protection cap.

- Slide old air line through gaskets - 1 and 2 -.






- Then slide air line with some force through edges - 3 and 4 - of cutting rings as far as stop - 5 - in line connector.

- Slide the foam rubber onto the connector piece.

- Repeat procedure with new air line.

- Connecting piece, replacing. Refer to => [ Connector Piece ] Connector Piece.

Separating Point, Overview:

Separating Point: Air Line for the Front Air Spring Damper





- Loosen the original air line - 2 - from the line - 3 -.

- Surround the wiring harness properly.

- Air line, servicing, refer to => [ Air Pipe Line, Servicing ] Procedures.

- Attach the wiring connector - 1 - and the new air line - 4 - to the wiring harness with cable ties.

Tightening specifications, refer to => [ Air Line Connecting Pieces Tightening Specification ] Description and Operation

Separating Point: Air Line for the Rear Air Spring Damper





• Route the new air line - 5 - in a large loop as illustrated.

- Loosen the original air line - 3 - from the line - 4 -.

- Surround the wiring harness properly.

- Air line, servicing, refer to => [ Air Pipe Line, Servicing ] Procedures.

- Attach the line connector - 2 - and the new air line - 5 - to the air line leading to the pressure reservoir - 1 - and to the line - 4 - using cable ties.

Tightening specifications, refer to => [ Air Line Connecting Pieces Tightening Specification ] Description and Operation

Separating Point: Air Line for the Solenoid Valve Block Inside the Vehicle

• If the air lines on the solenoid valve are damaged, then route the separating point inside the vehicle interior (spare wheel well) due to the short lines.

• Guide the new air line to the solenoid valve block through the opening - 1 - in the spare wheel well.






- Loosen the original air line - 3 -.

- Surround the wiring harness properly.

- Air line, servicing, refer to => [ Air Pipe Line, Servicing ] Procedures.

- Attach the wiring connector - 2 - and the new air line - 4 - to the wiring harness with cable ties.

Tightening specifications, refer to => [ Air Line Connecting Pieces Tightening Specification ] Description and Operation