I had the opposite experience, I bought my car 2nd-hand with low miles and I went to Volkswagen dealership for the transmission service on the Dual Clutch transmission as shown in the manual. I said I’m here for the 40,000 mile service - ignorantly thinking that they follow their own manufacturers recommended maintenance. Changing the fluid in the transmission is complicated on cars with a dual clutch transmission and must be carefully done. If the transmission is damaged it’s very expensive to replace. They charged me almost $2000 and then I looked at the receipt and they didn’t change the fluid at all - in fact they did almost nothing besides jiggle the wheels and change the oil as far as I could tell! I was angry about this so they sent a tech out who tried to tell me that since it’s an “automatic transmission” it should be good for 80,000, Volkswagen just tells you to change it early.

I never returned to that dealership or any other with the car because it was clear that although they sell the cars they know almost nothing about them.