See this thread: http://forums.quattroworld.com/a8/threads/4687.phtml
Not very good pics, but on my (PF) car there are 2 electrical connectors to the right (nearside) of the main ventilation air intake (looking from the front) at the back of the bonnet.
Easily accessed from the top by hand. Next to the two funny cylindrical/domed things that are all part of the auxiliary pump unit.
I just unplugged them one at a time until I determined which operated the pump built in to the unit. And it's been like that for a while now, no problems.
Mine were purple IIRC.
BUT my pump didn't run on constantly, so maybe you've got a faulty switch or relay somewhere?
This was my problem thread: http://forum.a8parts.co.uk/showthread.php?t=4052
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2003 D2 FL S8. Irish Green Pearl/Beige. Solar sunroof, auto-dim mirrors, electric rear seat functions and extended leather. Ski hatch retrofit. Aftermarket reversing camera. DVB-T and XCarlink now removed as redundant.
2016 Volvo V40 T5 Cross Country (4WD) with ALL the toys including adaptive cruise etc. etc. Osmium Grey with Blonde/Charcoal leather interior. Polestar performance "optimisation".  (Even rarer than a D2 S8!) Oh, and a brand new engine at just under 30,000 miles on the factory one! 
Finally: gone, but not forgotten.....
1998 D2 PF S8. Agate Grey/Platinum. Every option (I think) except electric rear seats, Tiptronic steering wheel, ski hatch, towbar & dimming door mirrors.
e.g. Cruise control, NavPlus/TV, Bose, GSM, Xenons, Solar roof, Parking sensors, Alcantara/leather everywhere of course.  (internal dimming mirror added later)
1998 (very early) Ford Focus 1.8 Zetec; ABS/TCS, Heated screen/mirrors, Aircon. Added Auto-dim mirror, Leather seats, Trip computer, Cruise control, OEM Ford SatNav with CD changer.
And before that a lot of Rover 800s, a few oddities, a lovely Triumph Dolomite 1850HL with Overdrive and way back in my schooldays an Austin Seven aka Mini 850!
Last edited by HPsauce; 29th April 2012 at 08:47 PM.
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