So my 2010 S3 Sportback apparently has the Generation 4 Haldex system? So far I've called two Audi dealers and got two different answers regarding servicing. First dealer tells me 40k for Haldex oil and filter, second dealer tells me it's sealed for life and does not need servicing. So I go to a recommended VAG "specialist" website, AwesomeGTI and start a chat, ask them the question and am told with no doubt my 2010 S3 has a Generation 2 Haldex system and requires oil/filter change every 20k. Can anyone clear this up?