I visited a Mazda dealership to look at a Mazda 3. Like most cars nowadays, it had an ambient temperature display on the dash. Thinking it a long shot, I asked the salesman if there was a way to switch the temperature to Celsius. He lit up, and said that yes there was, mentioning that he just learned it in training a few days before. One had to press a couple of buttons and then hold them for 5 seconds. The temperature did indeed switch to Celsius. We never got into any kind of metric conversation, but the salesman did volunteer a couple of things: this was an undocumented feature, nowhere to be found in the user's manual, and that Mazda will most likely make this process easier in the coming years.
It's interesting to consider that Mazda actually made a point of conveying this little trick to its US salesforce. And I consider myself lucky that my salesguy remembered it. Having read here what pains people went to with German cars, I'm glad to see that Mazda makes this a fairly painless process. Remek
