"I ordered the Look Up Dummy Cling for a friend of mine that just bought a roof rack for his mountain bike. Even though the Mercedes is Pre-Owned, it’s beautiful and I would hate to see his gear come to a frightful end on the roof of the car. I gave him two Clings (LookupDummy was kind enough to send me several) so that if he forgets to look straight ahead at the one, maybe the other will catch his eye. I don’t own a roof rack for my fattie, but I still have a Cling in my upper vision so that I don’t forget to look carefully when I am backing. It does happen. Last summer, I had to turn around in a tight space and twisted my rack when I backed into a tree. So, these wonderful Clings are a very economical way to save yourself tons of money by not driving into your garage with your expensive (or not) gear on top and damaging the roof rack and your car or SUV. Do not hesitate - buy a few of these and give them away to your friends or have them order some! BTW, LookUpDummy.com also provides excellent, prompt customer service" ~Kevin R.