I have an 2001 BMW X5 I am attempting to change the low beam bulb. It is on the Driver side, I have removed the three bolts that hold the AFI oil & the Coolant overflow. Thier looks to be a cover over the rear of the Bulb w/ a rubber boot & a wire running out of the boot. Do I need to remove the rear cover? The entire headlamp? Need a little direction... I have purchased the bulb it is a D2S 35 Watt Metal Halide.