The final result on my E-Diff

Finally, the issue has been fixed (I do have my fingers vcrossed at this point) The total bill to find the issue was £87,000 (which I am not paying, dealers bonus that one). It wasnt the valves fault, the hydraulic pipe which feeds the E-Diff had clapsed inside, couldnt be seen from out side. This was puting small parts though to the vavule in the E-Diff resulting in it blowing every time it was replaced. This only took 8 weeks of the car in the dealer in total, 4 visits from Ferrari in Italy, one trip from the dealer out there, exrays of vavles, and the gear box and E-Diff being rebuilt.So not much then.
So if your E-Diff keeps going and no one can tell you what the issue is and you keep getting issues tell them to chack the pipes

 

£87,000 was the total invoice, lucky I didnt have to pay it more than the car is worth, it came from stripping it down time arfter time, and replacing the valve, couple with stripping out the gear box and replacing bits. In total the entire system was taken apart 6 times and put back together, They took a £91,000 one off thier forcourt to get parts for the gear box etc, it just got silly
But your e-diff valve goes then goes again when you have had it repaired think on may not be the vavle could be the pipes
I hope this helps someone