I just did the 40K on our alltrack 99% the same except oil filter is up top and no fuel filter. Took about 2-3 hrs with dinner mixed in the middle.
Only pain for the MQB is removing the battery tray, including the batter terminals zip tied to it, there's 3 bolts and a nut way out back by the firewall, took some futzing to get the wire loom out of the way to remove the tray, other than that DSG fluid is a piece of cake.
Also I recommend filling the DSG before you replace the filter/housing, (leave the housing open to air) i did that on our passat and it seemed like fluid flowed way faster (prob quarter of the time) than if you place the filter/cap back on.
I do recommend doing it on a relatively warm/freshly driven car, if you're quick enough for both oil and DSG (if you over fill and drain) it doesn't take very long at idle to get the DSG fluid back up to temp. I wait until the oil temp gets back up to +150F and drain the excess away.