13 53 240 Replacing complete fuel injection pipe (N52T)

Special tools required: 

• 13 5 161

Necessary preliminary work: 

• Read out the fault memory of the DME control unit.
• Switch off ignition.
• Disconnect BATTERY EARTH LEAD .
• Remove ACOUSTIC COVER .

Recycling 

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

Observe country-specific waste disposal regulations.

Unlock and detach plug connections (1) on control unit.

Unclip wiring harness (2) from connector strip for fuel injectors.

Fig 1: Identifying Plug Connections And Wiring Harness

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Remove protective cap from compressed air valve.

Fig 2: Locating Protective Cap From Compressed Air Valve

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

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

Fig 3: Identifying Compressed Air Line

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Detach connector strip (1) in upward direction from fuel rail.

Fig 4: Detaching Connector Strip

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Unlock and detach fuel line (1).

Unfasten screws (2).

Tightening torque: 13 53 1AZ .

Remove fuel injection pipe (3).

Replace sealing rings on fuel injectors.

Fig 5: Identifying Fuel Line And Fuel Injection Pipe

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Close off fuel hose with special tool (1) 13 5 161 .

Fig 6: Identifying Fuel Hose

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