I've tried to find the answer to this online but no dice so far! With the touchpad on the top of the MMI dial, I find it's inconsistent as to whether it thinks I've written an o (the letter) vs a 0 (the number). Does anyone have a consistent way of making sure it knows which one you've written? I was hoping that maybe drawing the zero with a strike through it might help but that just puts the foreign Ø character (from Scandinavian languages). I was also having trouble with an l and a 1 briefly but worked out that a line straight down would be an l and a line straight down with the little line at the top would be consistently read correctly as a 1. Anyone got any advice?