Hmmm...so basically you already knew everything I wrote? If so, sorry. I would agree with you because I think that even if the speedo is electrical, the signal is probably still driven by a cable and thus the odometer driven the same way as if the speedo were mechanical. However, if the 126 gets a signal from a wire, I too would wonder how the odometer works. Which I guess brings us back to your original question! I'm a lot of help, huh!