Listed here is a good used Volvo C30 / S40 / V40 Headlight switch.  All tabs in-tact.  This unit functions properly.   This unit is from a 07 S40 that was insurance totaled.  Please see picture.

This unit was checked for normal function, it works great!  Your best bet here is to compare part numbers to be sure you are getting the correct switch.  Even inside of the fitment range, there are several different variants of these depending on your specific cars optional features.  You want to be sure you get the correct switch!

 List price at Volvo USA was previously nearly $480! get this one for less than you would pay in tax at the dealer! I only sell the OEM units, never aftermarket so they are the same quality as your original. 

I will offer a 30 day functionality guarantee ,Thanks for looking and good luck!