There are actually 3 suction jet pumps in the tank(what you call pulverisers) 2 on the right side and 1 on the left side. They pick up fuel from lowest parts of tank and bring it to fuel delivery unit. As you say they work from returning fuel stream going through them. If fuel delivery unit is not seated properly returning fuel just drops in tank and does not go to suction jet pumps.
The problem is not just for quattro cars as exhaust goes in the middle anyway and even if it is not divided pump is not in the lowest part of tank.
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Currently 8less
2011 Q7 S Line 3.0TDI, 2016 Tesla Model S 90D
8 history:
2006 A8 Sport 4.2TDI quattro SOLD,
1997 S8, reached end of life with gearbox failure
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