just pull out on it with your fingers, it's held on by clips.
You must remove the plastic "buttons" holding the trunk lining (flathead screw driver). Remove enough to get lining out of the way to have access to the back of the tail light assembly.
remove bulb from in side the boot
Remove the wiring harness from the high mount brake light. Remove the back cover of the brake light assembly. Take hold of the brake light connector, push in and turn at the same time. Reverse the process to install the new brake light.
The brake light assembly can be access through the cargo compartment. Remove the cover to the brake light assembly. Take hold of the brake light connector, push in and turn at the same time. The brake light will come out. Reverse the process to install the new brake light.
You can access the brake light bald through the trunk compartment. Remove the trunk liner from the tail light assembly. Push the brake light connector in and turn at the same time. The brake lightbulb will come out. Reverse the process to install the new brake light
A brake light on a 1999 VW can be accessed through the rear of the vehicle. Locate and remove the plastic covers for the light housings. Remove the bulbs. Replace with new units.
In the top of the trunk near where the brake light is located, there is a small plastic window, remove it and you access the light bulb.
I have a 95, which is obviously a different body type... but on mine you have to remove the plastic trim along the inside of the trunk behind the brake light assemblies. From there you can remove the plastic clips that hold various parts of it on.
you remove plastic red/white cover with 2 screws and remove bulbs.
Open trunk remove 2 plastic push pin remove cover
To change brake light bulbs on a 1998 Lexus ES300, open the trunk lid. Locate the plastic rivet on the side of the trunk liner. Turn the rivet while pushing in with a screwdriver. Remove the rivet and the trunk liner can be pulled away to access the bulb. Push in and turn the bulb to remove. Insert the new bulb the same way. Replace the rivet in the trunk liner.
Follow the link below, labeled "How to replace a Lexus IS300 tail light"