It means switch ignition off, right off. 15 being ignition, R being radio.
The last line of instruction says "Switch ignition on for at least 10 seconds"
We pay the Germans good money for this stuff, still we have to put up with half hearted translation.
Message Thread BMW E93 330D M SPORT air mass adaption - Fixed # - Phil Dunmore May 9, 2017, 4:03 pm
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