Took some finding (esp. in English!):
https://aazor.com/switzerland/volvo-...oost-function/
But no mention on the official Polestar site... 
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Present: XC70 D3 Lux 12 P*
Past: V70 2.4D Lux 58 XC70 D5 Sport 08 P* XC70 D5 Lux 61 XC70 D5 Lux 12 P* XC70 D5 Lux 15 P* XC60 D5 Lux 16 V90CC D5 Pro 67 P*
V90CC T6 Pro P*
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