VTG poles fixed???? How can I make it manageable again??

Hello, I would like to ask you a question again. In my Golf TDI IV, built in 1999, 110 hp, automatic, km-Stand 132500, engine identification letter AHF, probably according to the free workshop the VTG-Stands of the Turbo is fixed. But now I have read in a forum that you can also make this possible by moving the stick back and forth. I have not found the stick yet on my engine. Can you tell me where the stick is. A picture might not be bad. And how can it come to that, that this stick gets stuck, and how can it be prevented. Does one of you perhaps have another idea? Thank you for your answer. Lg Tom:-)