1, Checking current levels. ATF dipstick, fairly obvious. Oil level should be between two circles on dipstick. Check with engine on, at idle and in neutral.
2, Filling & Draining, Haynes suggest top up through the dipstick tube. That's fine, it's abut 25mm diameter. I guess we'll find the drain plug easily enough, underneath.
3, How much oil? I've heard you can only put 50% volume in anyway as the gearbox retains the other 50% in the torque converter, true? 6.0 litres from dry, 3.0 litres service & drain.
4, What type of oil; DOT 4? What is the VW reference number or recommendation?
info: Difference between max/min on automatic dipstick is 0.4 litre
To change the fluid and filter - take the sump off :) - Messy job :(
It's about 3 litres to fill up. Drive it and change again after 1000 miles or so to get it all out.
Be very careful not to overfill it. If you do then it will cause damage.
Don't use DOT 4 brake fluid.... Use ATF