Can anyone tell me what is the best time to change the gearbox oil, i have an a3 04 reg 2.0 tdi auto and the clock is on 52k miles, is it true every four years the gearbox oil must be changed?

any comments welcom.
thanks

 

The recommended DSG fluid and filter change interval is 35,000 miles for my 2006 A3. I believe that VW recommends 40,000 miles for the same transmission in their models.