problem under the wiper arm

Friends either I couldn't find out what it worked for or it was broken. Under the wiper arm, the trip computer probably has a handle that says mode vs a thin arm. But I turn it back and forth back and forth nothing, I wonder if there is an expression of the arm or its broken production?

And does the 2000 model comply with 206 xt, 3 lines of information display

I couldn't solve it, I follow the matter

Tape control teacher, that arm is useless if the original tape is not attached, the 3-line information display fits the models that were makeup after the 2003 model.

Thank you Serkan: / I thought it was the arm of the trip computer, but it wasn't.