Vw Touren upgrade Tachometer

Hello everyone, i am very desperate for any help. I have a 2018 Touran r line 2.0 150 ps. Recently i went to a VW handler to ask what digital speedometer fits my car. 3G0 920 320 B is the part number. Today i went to the dealer for coding and they told me, sorry doesn’t pass to my car. If anyone has any advice or has successfully installed a digital speedometer please any advice will help.