I disagree, in my opinion their is nothing polite about it. I believe that the dealer is saying, are you stupid or desperate enough to pay our price. I’ve even had the dealer lie to make the job sound hard so that they could get the work. My wife took her car to the dealer when I was out of town. They told her it needed a vacuum check valve and should be replaced immediately to prevent damage. The dealer cost $169, the price for the part at the dealer $8 and the time to install 30 seconds. She waited for me to get home.