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 

• Refer to -Item  ) OVERVIEW - AIR LINES - List Item: Air Line