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‒ → Fuel diverter for the additional heater -A-
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‒ Ascending pipe (in the fuel tank) for fuel diversion -B-
Notes:
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◆ If the additional heater fault memory displays the fault "Loss of flame" or "No flame formation" the cause for this may be an ascending pipe that was installed improperly or pinched upon installation of the fuel pump. The correct installation position of the ascending pipe may be checked as follows:
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‒ By checking the -V54 metering pump displacement using a fuel container with a capacity of approx. 6 litres of fuel.
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‒ Following removal of the fuel pump unit and visual inspection of the ascending pipe. The ascending pipe must be routed straight downwards
=> Relevant Workshop Manual, Fuel Supply
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◆ The connection for diverting fuel for the additional heater is welded into the fuel tank and only present on vehicles with a diesel engine and a fuel-powered additional heater.
=> Relevant Workshop Manual, Fuel Supply
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