Air Line, Servicing
WARNING: This page is about a different variant/trim than selected.
Special tools, testers and auxiliary items required
- Torque wrench V.A.G 1783
- Insert tool 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 → Connector Piece, Replacing .
NOTE:
- The air line between the air supply unit and the solenoid valve block is replaced completely with original line. 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 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 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 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. Connection Areas, Overview → Connection Areas, Overview: under Air Line, Servicing .
- Contaminants entering the lines can lead to system malfunction.
- Clean connector piece area and corresponding separation point.
- Cut through the air line at a right angle at the connector area using air hose pliers VAS 6228 → Connection Areas, Overview: under Air Line, Servicing .
- Remove connector piece and air line.
- Then mark ends of air line in vehicle and both ends of new air line with a waterproof pen.
With 17 mm or 22 mm markings, check whether connector piece is inserted far enough in air line.
- Place foam rubber on both lines.
- Install new line connector.
NOTE:
- 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 foam rubber onto connector piece.
- Repeat procedure with new air line.
- Connecting piece, replacing → Connector Piece, Replacing .
Connection Areas, Overview:
Right front air spring damper separation point in the right wheel housing
- Air line (shortened new original line)
- Foam rubber, 10-15 mm long
- Line connector
- Plug socket cable tie, for line connectors to the wiring harness
NOTE:
- In this area, the original line must be used as a replacement because only the original line has the foam rubber protector. Also, the original line has a very narrow radius in the area where it connects to the air spring damper. This narrow radius cannot be created on the air line from the repair kit.
- Secure line connector - 3 - on the plug socket - 4 - using a new cable tie as shown in the illustration.
Right front air spring damper separation point in the left wheel housing
- Air line
- Plug socket cable tie
- Foam rubber, 10-15 mm long
- Line connector
- Cable tie, for the line connector to the wiring harness
- Install new air line - 1 - in plug socket using a new cable tie - 2 -.
- Secure line connector - 4 - on the wiring harness using a cable tie - 5 - as shown in the illustration.
Separation points near the solenoid valve block for the air lines routed to the back
NOTE:
- The illustration shows all three line connectors for the air lines routed through the interior.
- Secure one, two or three air lines as needed to each other and on the existing air lines using cable ties - arrow B - as shown in the illustration.
- Install the air lines in the line bracket - arrow A -.
Right rear air spring damper separation point
- Air line
- Foam rubber, 10-15 mm long
- Line connector
- Cable tie, for the line connector to the wiring harness
- Cable tie
- Secure line connector - 3 - to the wiring harness - arrow A - and - arrow B - with cable tie - 4 -.
Separation point for left rear air spring damper and pressure reservoir.
NOTE:
- The illustration shows both line connectors for the left rear air lines.
- Purple air line (shortened new original line), for pressure reservoir
- Black air line, for left rear air spring damper
- Foam rubber, 10-15 mm long
- Cable tie, for the line connector to the wiring harness
- Line connector, for the black air line
- Cable tie
- Line connector, for the purple air line
NOTE:
- The original line must be used as a replacement for the purple air line because only the original line has the foam rubber protector.
- Secure one or two of the line connectors - 5 - and - 7 - as needed on the wiring harnesses - arrow A - , - arrow B - and - arrow C - using a cable tie - 4 - as shown in the illustration.
Tightening specifications
| Component | |
|---|---|
| Connector piece in solenoid valve block | 2 Nm |
| Connecting piece in air supply unit | 2 Nm |
| Connecting piece in air spring damper | 3 Nm |
| Connector piece in pressure reservoir | 5 Nm |
| Connecting piece in line connector | 5 Nm |