Since 2001, that is a request to dealer.
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Always willing to listen, just not able to take direction.

Unlike my trusty 965 (which had a user-accessible switch to select or de-select DRL) the newer models can only be de-selected using the dealers' scan tool.

At least that what my owner's manual says.

In fact, lots of the electronic features of Volvos are dealer-only modifiable (for a fee, that is).

Bob

I have a feeling that this feature is controlled by the car's computer.

For these late models (although you neglected to provide specifics of model and year, so I'm guessing that you've got relatively new, used cars), lots of equipment and accessories cannot just be "plugged in" -- their proper operation requires a bit of reprogramming of the car's computer. Similarly, I'll bet that there's a selection on the computer screen that allows the DRLs to be activated, or deactivated.

The questions are, (1) is this so? And if so, (2) will your local dealer be willing to do this (certainly, he won't do it at all without a fee ;-)? While there isn't a federal or state law requiring them, there might be a Volvo official policy.

As far as I know, that is not possible in USA models. I am not sure if a different headlight switch would leave the lights off. Buy one the next time you are in Europe. One option (at least on the S70/V70) is to turn the switch to position 2. The headlights will be off but parking lights on.