Wiring Diagram: Cruise Control Sharan TDI 11/99 81 KW

Hello everyone

does anyone of you have a wiring diagram for the cruise control system of a Sharan TDI 81kw?
When I check the cruise control with VAG Com, there is no response when I press 'Set'. Now I want to measure the switch briefly, but the VW [insert derogatory term here] won't give me a wiring diagram, even though my company has a monthly turnover of 1000 Euros.

I hope someone sees that it's not fair to pay 40 euros for a diagnostic scan, and that you can somehow help me.

Thank you in advance, July

[Translating...]Also mal von vorne.
Du hast den Schalter nachgerüstet? Wenn ja , hast Du die GRA auch aktiviert?