I just installed my third brake light in a W126. In my haste i did not confirm the wiring was correct.ie. red to center, black to base. My question, does it really matter. I know the electrons will flow either way through a bulb but I need to know for sure I will not fry the cruise or something.

No answer yet so I am bumping to a current post.
Anybody??????

Will cause no immediate problem. The current will simply run through the bulb in the opposite direction. However future problems may occur that could cause unnecessary complications like a blown fuse if someone should short out the socket thinking it is wired correctly. (because the black wire is connected to where the hot wire should be a vise versa.)

Now why didn't I think of that.

Thanks