I have had a bit of bad luck with my 2012 V60.
The seal on the left hand side head lamp has somehow failed and allowed moisture in. As a result my mechanic tells me the HID control module needs replacing.
They quoted $1000 for a factory replacement. Ouch.
They suggested a couple of alternatives:
finding a second hand one at a wreckers buying just the ballast module part #89089352
Any suggestions for reputable suppliers ? So far I have only found the module for sale and in stock on ebay.