The leak down by the oil filter is going to be the oil cooler, a very common failure as you may find by reading the forum. The usual failure is a plastic pipe between the cooler and the engine, but that usually results in loss of coolant. Oil down there would suggest one of the seals has failed between the cooler and block, its major surgery to repair based on the invoice I had with the old D2.
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Manny
2004 A4 1.8T Sport Cabriolet, 89K Miles
Past
2004 D3 A8 3.7 Quattro, Xenon, Bose, Blinds, Solar Sunroof, TV, ACC, phone and almost every option. 168K miles rising slowly
with retrofit AMI and DVB-T in place of Analogue
2003 Volvo S60 D5 SE Manual, 197K miles.
2001 D2 A8 3.7 QS, Bi-Xenon, Bose, Blinds, Electric Everything, retrofitted RNS-D, 191K Miles
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