DSG services require the proper temp method if you are filling from the bottom (also the faster fill method) because you can't measure it out like a top fill method. If you are filing from the top (the slower method takes about an hour), just put in 4.7 liters and you're done.
It's been discussed that the acceptable range for fluids in the 6-speed DSG ranges from 4.5-5 liters. I just passed 100k miles on my car (55k of those miles with Stage 1), did 3 DSG services (40k, 70k, 99k) using the 4.7L top fill method each time, and the car still shifts perfectly fine.
When I did top fill method, I added the 5 quarts, then got it up to operating temp, monitored with VCDS, then opened the drain plug while it was running and let the excess drain out from the secondary filler plug until it just stops drizzling out.