I emailed a guy on German eBay who sells TMC units and cable sets. He says that I must have a TMC unit with the 'A' revision after the part number in order to make the cluster functions work. Does anyone know if this is so?
That's what I thought. But I had sent the TMC unit I have to Teddy B and he checked it in an A6 installation and sent it back with a note saying the unit was good. It is now installed in my 2000 A8 and I have tried everything to get it to work but it does not, so, I am wondering if the German on eBay is correct about the A8 taking an 'A' revision.