Right trunk tail light out and left trunk tail light is extra bright on a 2001 Audi A6. How do you get inside trunk lid to access these two lights? Is this an electrical problem or is it a light bulb problem? This is a 2001 Audi A6.

Ck the fuses here is the info if you already haven't.
1-Headlight washer jets
2-Turn signal flasher
3-Headlight washer, glove box light, engine bay light, instrument cluster
4-License plate lights
5-Instrument cluster, heated seats, auto trans display, outside air temp
6-Central locking system
7-ABS
8-empty
9-heated mirrors
10-empty
11-cruise control(auto trans)
12-on board diagnostic system
13-brake lights
14-interior lights
15-power windows, climate control
16-ABS, anti-slip(?)
17-heated door locks
18-right high beam
19-left high beam
20-right low beam
21-left low beam
22-tail and side marker (right)
23-tail and side marker (left)
24-wipers and washer jets
25-blower for heating/climate control
26-rear window defogger
27-empty
28-fuel pump
29-engine timing
30-sunroof
31-tail lights, cruise control, auto trans
32-engine timing
33-cig lighter
34-engine timing
35-trailer receptacle(?)
36-fog lights
37-radio
38-trunk light, central locking system
39-flashers
40-horn
41-empty
42-empty
43-heated seats

Ok there's the numbers. To figure out what the hell that means you have to look at the inside of the cover to the fuse box. left side of dash panel. Good luck.

1) Open trunk
2) Remove small round plastic access panel with a flat tip screw driver by prying open
3) Remove flat tip screw holding tail light assembly
4) Remove tail light assembly by pulling outward, careful not to break plastic guide/nub
5) Disconnect wiring connectors
6) Remove plastic housing access plate on back of tail light assembly by twisting/turning tabs until they click and then lift access plate from tail light assembly
7) When viewing the the bulbs, the turn signal bulb is the bottom left bulb
8) Install in reverse order, ensuring tail light seal seats properly during installation

Start by opening the trunk lid. On the sides of the trunk, just beside where the trunk lid sits when closed there is a circle cap on either side. Remove the cap it is the same material as the trunk side trim (fuzzy carpet) then there will be a screw set into the hole that you just uncovered. You can use either a philips screw driver or an 8mm socket and remove the screw/bolt. you may need to reach in with a set of needle nose pliers to remove the screw after it is loosened all the way. Once the screw is removed grab the tail lamp assembly from the inside and twist the tail lamp out of the holding pins located on the side edge of the tail lamp. The whole light will come off of the body in your hands. Once the tail lamp assembly is out there is an access panel on the back side where all the bulbs are installed. Depress the two holding tabs on the sides and carefully remove the bulb holder. Then replace any blown bulbs and reinstall.

access light through trunk, most likly light bulb burnt out. should be plastic screws holding light fixture in under trunk carpet.

open the trunk and take the carpet panel off that is right behind tail lights. it is held on with plastic like wing nuts and you will have access to the screws that hold them on. you have to do it all from inside trunk.

Look inside the trunk on the side where the relative light cluster is that you require. There will be a cover there. Remove that and the light cluster will be accessible to replace the bulb. If the light cluster does not come away with the cover, carefully lift the plastic tab holding the cluster in place - they get brittle and can break very easily. Check the operation of the lights before replacing the cover.

On the 2005 Audi A6 3.2 (6 cylinder) the battery is stored in the right rear trunk, under the trunk floor lid. Note: To jump start the car, you simply raise the engine hood, and look in the upper left corner of the engine compartment, just slightly below the plastic cover. There you will see connections that lead to the battery and are specifically designed for jumping (or charging) the battery. You will need to lift up gently on a reddish brown cover which is protecting the positive terminal. The negative terminal (black) is not covered.
Under no circumstances should you attempt to jump the battery directly. The battery could explode and you could get sulfuric acid on your face and in your eyes, which would be bad. Very bad.

you most likely have to go through the trunk there should be some plasic nuts unwind them and the tail light should come out or you can usually get to just the bulbs without takeing the whole assembly out each bulb socket should come out with a 1/4 turn

I can't solve this problem, but have had the entire left tail light unit on a 2005 A6 replaced under warranty 5 times in 3 years. Once it was out of warranty, the dealer kept replacing bulbs and charging me $30 each, but it never solved the problem, even for a day (clearly looking to duck their lifetime guarantee on work they did).