Air Line, Servicing: Procedure

For each line a maximum of two repairs is permitted.
For a connected wiring harnesses only one repair location each is permitted.
The position of the repair location must be documented and supplied in the vehicle.
Clean separation point area before disconnecting air line connector.
Contaminants entering the lines can lead to system malfunction.

-- Clean the area on the connecting piece on the corresponding separation point. Refer to OVERVIEW - AIR LINES for the separation point overview.

-- Cut through the air line at a right angle at the connector area using : VAS6228 .

-- Remove the connector piece and air line.

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-- Mark ends of air line in vehicle and both ends of new air line with a waterproof pen -arrows-.

With "17 mm" or "22 mm" marks, it is checked whether the connector piece is inserted far enough in air line.

-- Place the foam rubber on both line.

-- Install the new wiring connector.

TIP:

Connector pieces in line connector are already tightened to the proper tightening specification. Air lines only have to be connected.

-- Remove the transport protection cap.

-- Push the old air line through the sealing rings -1 and 2-.

Fig 1: Identifying Sealing Rings, Edges, And Cutting Ring

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

-- Push the foam rubber on the connecting pieces.

-- Repeat the procedure with the new air line.

-- Replace the connecting piece. Refer to CONNECTING PIECE, REPLACING .

Separating Point: Air Line for the Left Front Air Spring

Fig 2: Separating Point: Air Line for the Left Front Air Spring

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-- Loosen the original air line -4- from the wiring harness -1-.

-- Surround the wiring harness properly.

-- Service the air line. Refer to Procedure .

-- Attach the wiring connector -3- and the new air line -2- to the wiring harness with cable ties -arrows-.

Separating Point: Air Line for the Right Front Air Spring

Fig 3: Separating Point: Air Line for the Right Front Air Spring

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-- Service the air line -1-. Refer to Procedure .

-- Secure the coated wiring connector -2- and new air line -3- with cable ties -arrows- on the brake line.

Rear Air Line and Front Air Spring Separating Point

Fig 4: Rear Air Line and Front Air Spring Separating Point

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-- Loosen the original air lines -1- from the wiring harness.

-- Surround the wiring harness properly.

-- Service the air line. Refer to Procedure .

-- Attach the wiring connector -2- and the new air lines -3- to the wiring harness with cable ties -arrows-.

TIP:

A repair with multiple repair locations is shown.

Tightening Specifications