Hello,
I can only agree with my predecessors.
ATU is now expensive and the quality of their work is poor.
"Furthermore, even parts that aren't broken should be exchanged to increase sales!" - Quote from an ATU employee.
Trouble with complaints. I had to go to the air conditioning service three times because they were unable to find/seal the leak, and I was supposed to pay each time within 2 months

.
All of these are my personal experiences at ATU in Dresden.
Then it's better to go to a clever independent workshop or a VW dealership.
Even though people are always complaining about Volkswagen, I haven't experienced anything like this there before.
Best regards, Albrecht.