You probably have noticed that there is a banner on your car- und user-profile pages which you can see on the overview of the profile.
If you hover over them with your mouse a button appears to edit them.
In the Banner-Editor you can select a Background-Image. You can modify the position of this image when dragging while the left mouse button is down. With the Mouse-Wheel you can alter the size of the image.
Beside the Background-Image you can also add multiply smaller images to you banner. You can sort them as usual by dragging the "Movement-Icon" (you can see it, when you hover over them).
You can use this banners to link to your car- oder user-pages from other websites all over the web.