Funny story overheard at the stealership.
Sitting at the Raleigh dealership waiting for my car, a woman got some very bad news about her 7 series. She was up from Florida and her CEL tripped. Even though the car was apparently running well, the service manager told her it would cost $8k to fix her problem.
The woman looked shocked and told the service guy she needed to call her husband. Before she could do that, another woman walked up to her.
"I'm sorry to bother you, but I couldn't help but overhear what just happened. Let me tell you, the same thing happened to me last year in my Mercedes. I told them to just turn off the check engine light, and I would decide later. Once the light was off, I took the car straight to CarMax and sold it within the hour."