Fuel Filter Location

Can anyone enlighten me where is the location of the fuel filter? I looked at the diagram given by ROFAG and it points to the location points to beside the black box item 6 (filter carbon vacuum absorber) below at the undercarriage side. However, it’s not there at all. There is nothing else there beside the black box. Can anyone share the info if you know? Appreciate.
 

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In the tank, it's a non serviceable item and only needs replaced every 140000 miles.