How do I remove the black clips holding the trunk lid liner in place? Need special tool?

Remove the wheels if possible.
Remove the two clips from each side (by pulling up the center).
Move the fender liner away to access and remove the 7 mm bolt that is near the corner.
Unscrew the four cargo anchors from the floor of the trunk.
Move the trim panel and remove the 4 10mm bolts.

To get to the license plate lights assembly, you can follow these steps:

Open the rear compartment lid and locate the license plate light assembly inside the trunk lid.
Above the license plate, locate four Philips head screws holding the license plate light assembly inside the trunk lid.
Remove the screws (caution: in winter, plastic is extremely fragile and can break easily).
Once the screws are off, your license light assembly is loose inside the trunk lid.

rear bumper cover removal?? ' Cadillac Owners Forum (cadillacforums.com)

2002 escalade changing liscense plate lights ' Cadillac Owners Forum (cadillacforums.com)

You will have to get the trunk open. Remove the cable or rod from the cyl. Plastic clip holds it in place. Just twist it back. Pull out the clip that looks like a U and holds the cyl into the trunk. You can still close it, just push sideways on the lever to open it. Just won't be able to lock it!

I just replaced my 2 bulbs an hour ago in my garage.
1. Pry off all the clips that hold the liner. I used a cloth covered spatula, so
as not to chip the paint, to pull out the liner a little bit and used my
index and middle finger to pull back the clip and the liner, very slowly to
prevent breakage. When all the clips are off, the liner will fall, no need
to remove the emergency release handle.
2. Press the tiny release lock that hold the wires in the socket and pull
out the wires, carefully.
3. Turn the socket 1/4 the the left carefully, while putting a little pressure
upward, then the socket will release.
4. Pull the bulb staight out and replace it.
5. Reverse the procedure and voila! A ton of money saved!!!!!!
MVC.

To remove the tail light assembly to be replaced, you need to access the fasteners from inside the trunk.

Remove the black plastic retainers holding the trunk liner in place on the side you wish to replace. Once you have removed the retainers, peel back the trunk liner in the area you will be working on. Disconnect the light bulb sockets (be careful not to break any bulbs). The tail light assembly itself is held in place by 4 - 8mm nuts on the bolts that protrude about 1/2". An 8 mm deep well socket works well, but an open-end wrench will do the same job, just slower. Some of these also hold the wiring in place, so take note of where everthing goes. To put it all back together, just reverse the process.

trimmers use a special tool shaped like a V to go behind the clip,BUT you will still break some, regardless of how careful you are.

The battery location for a 2005 BMW 545i is in the trunk. Open your trunk, and on the right side of the car (passenger), look for two black plastic screws (flathead fit) along the paneling. Use a flathead (from the tool kit amongst the trunk lid), or a paper-clip to turn both of these plastic screws 90 degrees, you should be able to pull these out with your fingers afterwards. The plastic screws hold in the protective paneling, you'll have to to lift up trunk-liner (covers your spare tire), then pull the paneling outwards; underneath, you'll find the battery and terminals.

In the trunk behind the lights you should find a series of small black plugs in the trunk liner. Carefully pull (or pry) these straight out and peel back the truck liner. You should then have access the the clips or nuts that hold the taillight assembly in place.

this ones kind of tough for an amateur. You need to pop off most of the little black retainers holding the trunk lid liner on. then theres the emergency handle that you use to get out if your locked in the trunk. you need to pull on the far end of the handle and the outer cover will come off. you may need a small screwdriver to remove it. then pull straight down, really hard and the handle will come off. then remove the rest of the liner. the bulbs are 194a bulbs. available pretty much anywhere. reinstall in the reverse order.

1. Pop the trunk
2. Remove the two Phillips-head screws holding the cover on
3. Using a slotted screwdriver, pry the cover away from the side of the vehicle (carefully!)
4. Twist the bulb seat away from the cover, a 1/3 turn counterclockwise.
5. Pull the old bulb out; discard according to any local laws
6. Push new bulb in
7. Test both your turn signal functions and brake light functions!!!!!
8. Return bulb assembly to cover; twist 1/3 turn clockwise to reattach it
9. Push tail light assembly clips into the seats on the side of the vehicle
10. Replace the two Phillips-head screws holding the cover on
11. Close the trunk; clean up

Tail light replacement is not as hard as it seems.
Tools needed:flat head screwdriver and a deep 5/32 socket(a pair of pliers will work).
Step 1: open trunk and pull back truck liner at tail light.There is a small button clip on liner.Use screwdriver to pop up the center of button clip,pull clip out of hole.
Step 2:You will see a black wire attached to the body of car with 2 white clips.Use screwdriver to pop clips off of studs.
Step 3:Remove the nuts from the studs and pull tail light assembly straight back away from car.The outer side of the light just snaps in and out of place.
Step 4:Turn light socket counter clockwise 1/3 turn and pull out.
Step 5:Pull bad bulb straight out and replace.Reverse steps to reassemble.