The speedo is not ratio it's just off by three unless you live in Japan. Apparently lying on a gauge related to human safety is not as good idea in Japan.

I'm not sure if it's off 4.8kpg or 5 for the the non nonsense part of the world (that uses SI units). I'm pretty sure it's 3 mph not 5kph in the USA. The literature goes though translation i wouldn't be surprised at all if it's actually 5kph off which would be 3.311 mph.

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2011 E70 • N55 (me)
2012 E70 • N63 (wife)