You can turn off your DRLs by turning on your fog lamps as Stella mentioned. You just have to remember to do it each time you start your car. I did that in the beginning, but would forget from time to time. My V had about 40,000 miles on it when I got it so it already had a lot of hours on the lamps and the damage was done.
I bought replacment LEDs from www.vleds.com and installed them in place of the DRLs. Since the DRLs double as the turn signal you have to add a load resistor for the turn signal to flash at a normal rate. The other problem was they didn't offer any amber LEDs made for continuous duty as DRLs so I bought the 5K white LEDs which I like as DRLs better anyway. Some states may require an amber turn signal to pass a vehicle inspection so that may be an issue, but it hasn't been a problem here. The LEDs I bought are p/n 3157_21_W_5K and the resistors are LR_650_P. They offer 5 or 6K LEDs, the 5K match the stock Fog lamps and headlamps better. They do have a dual color white/amber switchback LED 3157_92_WA2_5K, but they will not work in the XLR as the turn signal is just pulsing the DRL, not a separate circuit and the amber portion of the LED is not ment for continuous duty as a DRL. They have introduced a continuous duty amber LED since I bought mine p/n V3_A_C which should work for anyone that wants to maintain the amber color DRL and turn signal.
Gizmo figured out a way to isolate the turn signal circuit from the DRLs which means the switchback LEDs may be able to be made to work with some rewiring, but I have not looked into it again since I first installed my LEDs.
I wonder if there is an electronic flasher available that eliminates the need for the load resistor? I've seen them used in other cars with LED replacements