All Tiguan automatics are DSG, there are no torque converter style automatics.
That is incorrect. I remove the Aisin 6sp 09G/M automatics out of them all the time to replace the blown out rear main seals. I am 100% certain of that. And I am 100% certain that all the crazy spaz out valve bodies I replace in the Aisin automatics are also often in Tiguans.
Now there may be some newer ones that use the DSG, not sure. But I can tell you at least through 2012 they used the Aisin, because I have many Tiggy customers with 2008-12 models that come through here, and the lion's share of them are 2-pedal versions.
What sucks about removing the Aisin from the Tiguan is that they have an external ATF cooler that has this idiotic contraption with pipes and an adapto-flange atop the rear part of the transmission and all that nonsense is in the way of getting the bellhouse bolts out. The Jetta/Golf/Beetle with that trans just has the cooler back on the trans with coolant hoses going to it, like the 02E, 01M, etc. The B6 Passat and CC use an external cooler but it is less asanine of an arrangement as it sits off to the side up high near the battery. Although the pipe and adapto-flange is similar to the Tiguan. The Aisins also anger me in that their driveaxles are virtually impossible to remove from the transmission, so you either just leave them hang and take them out with the trans, OR you cut the big clamp on the inner boot and slide the plunge joint out and leave the stump in the trans and then slide it back together when done with a new clamp. But then the clamp can be a pain to crimp, especially on the driver's side. Argh, I've done so many of those stupid rear main seals.