Hello, I have a problem with the reverse light. They are always on. I have read that it could be the reverse switch.
The reference is 01E941521B. I know it is located in the gearbox.
But I can't find it. I don't know if to replace it I have to do it under the car or on top of the engine. 
I have searched for videos but I can't find the one of my model. I have been able to find other videos from the vag group.

Do you know any workshop manual or video? Or does anyone have a photo of where it is?

Thank you very much sorry for my English

the Superb Mk1 (3u) is based on the long wheelbase VW Passat B5.5 (3b4)

 

Some part numbers will be different, but its still a good guide for the general location

 

A quick search actually turns up this video, hopefully it helps