After a spirited drive through the winding roads of the Minnesota Farmland on Saturday, I set up Sunday AM to wash off the bugs and dust.
After that, I experienced 2 classic TT problems.
Within 5 minutes of each other, and in my driveway, the brake light switch failed, as an intermittent, and the passenger door switch failed.
The display showed the passenger door as always `open'
I got the brake switch today, and tackled the door switch tonight.
I'm proud to say it can be fixed, and dismayed to find out, once again, Audi chose an inferior part, made in France, for this sub-standard switch.

Here is the culprit after removing the door latch assembly.
Piece of crap small plastic plunger broke apart inside the switch.




The switch is mounted at the top, open end of the door latch assembly.

The switch mounts in those 2 holes.
You can see this cam-type acuator here, that pushes the switch button in, as the door is closed.



I rummaged through my parts-bins, and came up with an industry-standard micro-switch that has stood the test of time as my replacement. I'll bet I could take this switch and substitute it in any major factory machine still in use today, and it would work. I'll bet this switch has been in my parts-bin for 20 years. Why Audi chose to use such a cheap switch is beyond me. This one will out-last the car I suspect.
I had to drill a new hole to mount it 90 degrees from the Audi one, and them I will epoxy it in place.


Here it is mounted and wired.




Here it shows the cheap-o switch in the same plane as it was orignally installed, with the new one, screwed in and epoxied in place.






Here it is mounted and in place.



I tested this and it works, and I'm re-installng it now.

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