where do you add the lubricant?

is this a video just to tell us to roll the window up and down?

You dont show which lubricant you use, or how to apply it?

It’s extremely uncanny how often you post a new video that is currently relevant to me! Thanks for showing me how to fix so many things that need fixin lately!

Very nice thanks a lot for the tip! Gotta love the Z3, I also have one that you can see on my channel. :)