How to get the ad track light off, or fix the ad trace light problem?

Where these lights added, I suspect they where, if so you will need to trace the wiring it could be a bad connection to the vehicle factory wiring.

unfortunately the electric seats from all of the car builders have never been able to fix the problems that plage them since their creation they are known for switchs going out motors and drives failing start by making sure you have power to all of these you will need to trace power from your fuse panel using a test light or volt meter next look check to make sure that the tracks on the seat are free of debri and clean then you will have to take the track apart and check the drive gears and cables to make sure they are not damaged

If it didnt trace back it could very well be that there is a break in the wire .

There are very few design flaws in the e46 (window regulators, sunroof guides). You just found one of them. BMW put dissimilar metals in the plug and pins in the tail light, and corrosion results. The ground connection corrodes long before the others. Cleaning it is a temporary fix. Replacing the tail light is a temporary fix. Adding a second ground connection is a permanent fix.
In the ground trace on the back of that tail light, you will find a tab for a spade fitting. Make an extra ground wire about 6" long with a spade fitting on one end and a loop on the other end that fits on one of the bolts that holds the tail light in. Do both tail lights while you are at it.
Actually, this was probably not so much a design flaw but rather a case where the plug and the tail light were made by two different suppliers who did not communicate their material selections to each other.

The SRS is your "air bag" or "Safety Restraint System". The potential for an injury is a problem. The system needs to be scanned by a professional and repaired. Common items to fail are clock spring which could be diagnosed by no horn or usually any other steering wheel controls not working. Another could be the front crash sensor. Once it is scanned the code can be used to track or trace the circuit leading to a fix. See a trusted technician in your area that is good on SRS/airbag systems and get the code. If you wish to get a second opinion as to the repair needed, let me know. I will be happy to help.

By your description I assume this is an interior light. You will need to trace the wires going to the lights and find the one that is grounding and causing a short. You might be able to remove all the interior bulbs and replace the fuse then after turning them on if the fuse doesn't blow replace them one at a time till you find the one that has a problem and trace that wire back. Make sure you check any spices you may have added to install Amplifiers or Radios that didn't come with the vehicle.

Had the same problem on ours. It stopped about 6 inches away from being closed. I could advance it and press the button, and it worked. About two weeks later it stopped working altogether. I had a black wire that was cut through. Trace the wires inside the black plastic wire mold track that looks like a tank tread. You might be able to see the cut. There are about 5-6 wires inside the track. Undo the wiring harness where the wire mold attaches to the sliding door gear. If you get a lighted 12vDC pencil tester (~$5), press the door button so it opens, and poke one of the wires in the wiring harness. If it lights, the connection is still fine. If it doesn't light work a little further back until the light comes back on, and some point in between is the cut. Using a flat head screwdriver, you can snap off the links of the wire track mold. They just snap back on with a firm grip.I resoldered the wires and some electrical tape.

I realized that when it was stopping part way the ends of the wires just happened to touch and allowed it to move, but when the door got so far the wire track had to bend separating the connection. The repair has been working for about 4-5months now.

next oil change or even now get a small bottle of engine oil trace dye and a Ultrviolet light. Add the trace dye to the engine and then after a cple days use the UV light and see where the leak is. The trace dye will be a bright blue or green, depending on the maker of the dye, "glowing" line/path. Follow it back to the source. Chances are it will be one if not a combination of 3 things: Valve cover gaskets, Oil pan gasket, Or one of the 2 main oil seals. Of the oil seal the rear main oil seal is a common culprit.

Please run a diagnostic scan on the car.

Can you hear the moter or do interior lights dim when pressing button? If so remove door panel and lubricate tracks and rolers using lithium grease lube only the tracks that do not come in contact with glass.

Check the connections at the switch and at the moter with a volt meter if there is power than time for a new moter. no power than check at drivers side switch. If no power there and fuse is ok you have a open in wires and will have to trace entire circut