I want to change the front differential gear oil in my 2004 Volkswagen New Beetle (1C1) L4-1.8L Turbo (AWV) FWD and can't find where to drain or fill it. All references I have found so far tells me to access the oil through the speedometer drive shaft which I have not yet found. Advice I have been given says it is located in the top area of the differential close to the inner cv joint. I can't see it nor feel it. I think my speedometer must be operated by an ABS sensor instead. If so how do I access the differential oil? Thanks. Joseph in Lakewood, Washington.