Cruise, Reverse Sensors, RPMs and Traction all not working

My vehicle has on it Parking Sensors, Traction, Tire Monitoring and Cruise Control, however none of these functions work, they do not even respond, click any button you want and you get nothing from them.

Now I know the car has these features, but I purchased it second hand, so I am not sure when they stopped working. Odd how all of them do not work, I assume a fault affecting them all rather that four individual issues.

Has anybody seen this before? Does anybody have any ideas what could be causing this?

I first thought fuses, but none are popped and I have played popping fuses into blanks, however I cannot find a Seat Toledo Mk3 fuse diagram (for either fusebox). (Would be useful if anybody has one)

Next is maybe an earth, but which one and where! (Diagram useful)

No fault codes are showing.

When you put car into reverse you do get a beep from the rear, but I assume this just runs from the reverse light.

Cheers,
Steve