Hi Mark
Sorry to read the problem is ongoing, I do know that feeling. Do try the CAN BUS termination test I suggested in my post, you might get lucky.
I think there are CAN BUS data loggers that plug into the diag. socket. The principle is that the logger is fitted into the socket and left there. You continue to drive as normal and the data on the CAN BUS is logged many times per second. After a few instrument failures the logger can be removed and the data stored within it analysed. You would need a professional to be able to do this for you, I will have a look on the internet to see if I can find a company that offers this service.
One other point I would be interested to know and may help others. According to the CANcockpit manual the speedo gauge can be configured to store the odometer reading within itself or get it from the ECU. Did the odometer show the correct reading when you fitted the new speedo ?
Good Luck
Regards Tony
