Um, it does this for me automatically - I didn't have to set anything.
The M 1/2 are useful for when taking the car to service / car wash or other situations where someone will drive it for you, so you get it back the way you want afterwards. Otherwise, the key will fetch your seat settings, metric/imperial settings (I use metric, SWMBO uses imperial), some of the radio/multimedia settings, and a probably a few other things too.
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