That nature of your question and how it was asked prompts me to deliver this answer:
Do what it says in the Owner's Manual (that Volvo book in the glove box): take it to a Volvo garage (who have all the right computers and tools) to diagnose and repair the problem.
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XC90 R-Design MY2009, Black Sapphire Metallic. HP-Sound, RSE, Nav, Tel, ParkingCam, BLIS, ParkingHeater, RestHeat, Removable Towbar, Summer: CRATUS 20x8 on Pirelli Scorpion Zeros 255/45, Winter: NEPTUNE 17x7 on Continental WinterContact 4x4 235/65.
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