actros 2 gear shift trouble

halo again, i have a mercedes actros 2 trouble in gear shifting, the gear will not shift when i push the gear shifter into gear position and keep in neutral all the time. but i still can run with emergency mode. no fault codes. i check and get no supply voltage to gear shift control.

any idea for the driver seat gear shifting button X73 9 pin connector wiring diagram? cause i need to know which wire for signal and supply voltage.

thanks.