Look for the write up I did on changing cluster light. For the d4 light, just take the one from the d1 slot, you shouldn't use 1 anyway reallyjust an update, i bought the car and replaced the horn and took a 1000 mile road trip with it, no problems. The only problem left to tackle is the right HID light that randomly tuns off at times.. Also, I want to replace the LED lights on the cluster as the D4 light is out? anyone know the size for that bulb?