A few months ago my mates wife ignored the parking sensors bleeping because she could not see anything and backed her car into a post. Since then I taken note of cars with deformed bumpers and have come to the conclusion that just as many cars with sensors have damaged bumpers than cars without. Today I saw a nice 64 plate E Class with a large post shaped crease in the rear corner. Of course some of those cars would have been the victim of someone else's misdemeanor but I have no doubt that many would have been self inflicted. So either the senors are not up to the task or they are being ignored. Just wondering if anyone has a tale to tell or an opinion?