i did not see a fuse on the WDS but there still might be one somewhere in the trunk or the glove compartment.
the LED will set off check licplate light in E53, i have been playing with reverse camera that goes into lic plate opening, and the camera has the LEDs for license plate, and they set off the warning. I will be turning off the warning later, with the programming the cold monitoring of lic plate light set to OFF.
in the bmw the cycle is the ignition on/off but there should be a delay - i do not know the exact delay, but the car normally goes to sleep 16 minutes after last activity on the iBus.
i remember replacing the fog light bulb, and ther light did not come on with a known good bulb - then, i drove, parked for an errand, came back, tried again, and it worked... worth trying with regular bulbs, they are $4-5, better then spending $150 for the handle...