Loads of vids on youtube give good advice not too scary a job few pointers I learnt
DSG filter can be removed without removing battery just remove the air intake, 24mm socket with universal adapter gets it off. Leave it off while filling the DSG box. I used bottom filling method with filling hose off eBay. when box is full refit with new o ring torque to 25Nm.
Hose like this
https://www.ebay.co.uk/itm/Filling-...m=273096961940&_trksid=p2045573.c100033.m2042
fill with the supplied oil kit, I got 6 litres in mine. drill a small hole in each of the 1 litre bottles to make it flow quicker. took around 30 mins to get all six in. make sure the snorkel is in the sump before attaching the filler hose. 8mm allen for the snorkel 14mm allen to remove the sump plug.
oil kit like this check right one
https://www.ebay.co.uk/itm/6-SPEED-...909246&hash=item3f62debbe0:g:AkMAAOSwu4BVs1pN
When full run the engine with the filler hose still attached but the intake replaced.
Use VCDS to check oil temp, on channel 19 in auto module.
Whilst oil is warming run the box through each position and hold for 3 seconds each time so from park to R wait 3 then N wait 3 etc, then back up again to Park. I did this a couple of times to make sure made a few weird sounds the first time through, made sure the oil was all the way in the the clutch packs.
When up to 35 degrees removed the filler tube and let oil run out as this is the excess bit scary but wait for the flow to slow to a trickle and refit the new sump plug. torque up to 45Nm and your done.