Have a 08 xc70,with the hid lights.Pass side is not working,removed light to access bulb,some places call for a D2S or a D2R,which is just a bulb?,another type is a D1S which seems to have a ballast attached to it,What type do i need,mine has the D1S type,the bulb seems like it does not come out of the ballast,but some places call for the D2S or D2R which is just a bulb seperate.The nearest volvo dealer is 150 miles away and are closed today on account of a holiday here.I dont want to buy the wrong one as they are pricey. Thanks Harvey