13 53 240 Replacing complete injection pipe (N51)

Necessary preliminary tasks: 

• Read out fault memory of DME control unit
• Switch off ignition
• Remove ACOUSTIC COVER

Recycling 

Fuel escapes when fuel line is detached. Catch and dispose of escaping fuel.

Observe country-specific waste-disposal regulations.

Remove protective cap from compressed air valve.

Fig 1: Dust Cap

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Connect compressed air line (1) to compressed air valve.

Blow fuel back into tank with a short blast of compressed air (max. 3 bar).

Fig 2: Compressed Air Line

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Unclip plug connection (1) from holder (2) and disconnect.

Unclip wiring harnesses from holder (2) and connector strip (3).

Disconnect holder (2) from injection pipe.

Detach connector strip (3) in direction of arrow.

Fig 3: Removing Connector Strip

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Release fuel line (1).

Tightening torque 13 53 11AZ .

Fig 4: Identifying Fuel Line And Fuel Rail

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Seal fuel hose with special tool 32 1 270 .

Fig 5: Sealing Fuel Hose Using Special Tool (32 1 270)

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Release screws.

Tightening torque 13 53 2AZ .

Remove injection pipe (1).

Fig 6: Removing Injection Pipe

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Lever out retainers (1).

Pull fuel injectors out of injection pipe.

Installation: 

Replace sealing rings on fuel injectors and coat with antifriction rubber coating.

Fig 7: Fuel Injector Retainer And Removal Direction

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