The cause of that issue (if it is that) is, according to the service manual for the fuel system, the seal between the the pump unit and the adapter plate -
◆ If the centering stud is not pressed into funnel, the fuel delivery unit will not seal against the adapter plate.
◆ If the baffle housing is not properly sealed, the engine will cut out due to fuel starvation when the tank is still 1/3 ... 1/4full.
But I am not sure whether that seal is achieved by a rubber seal or whether its just an interference fit between the components and why that seal would have been lost just by being unused for a month...
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2002 D2 S8 – Ming Blue, Valcona leather, Vavona wood insert, solar sunroof (to be fitted), Heated rear seats, extended leather pack, 18” Avus, ski hatch, Bose, auto dim rear view mirror, rear blind.
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