Your best bet would be to call official Volvo garage to have your car hooked up. Then they'll know exactly what SW versions are installed and what (if any) new ones are available.
It will cost something, but I wouldn't know how much, since I do all my regular (annual) services at official garage and they do this SW update while changing oil and stuff and never charge me anything for it (at least there's no price on the bill, there is listing of "software update xxydyx" but no price to it.
HTH
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MY16 XC60 D4
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