How to replace reverse light switch - Audi A6 (C6 4F 2.0tdi 6-speed manual) | More info
If your reverse lights are stuck in position ON, or they don't work at all and your bulbs are not faulty - then more likely that will mean - your REVERSE LIGHT SWITCH is faulty.
This video shows how easy it is to replace reversing light switch on Audi A6. This particular car is 2005 model with 2.0tdi engine and 6-speed manual gearbox.
For more repair and service instructions and manuals, please visit www.WheelsAndMotors.com.
If you are looking to buy new switch (by the way part number is '01E941521A') for a good price, here is eBay link for you that gives you choices:
If you are looking for tools to perform this task, here's another useful link:
Here's a link to another video that shows how to test switch in general and replace it on example of Volkswagen Golf Mk4 1.9tdi:
And here's the same for first generation of Skoda Superb 1.9tdi: