Official release from UT..doesn't sound good
Her mind is Tiffany-twisted, she got the Mercedes bends" 
Quick Thought
A really masterful line by Don Henley here and yes, he intentionally wrote "Mercedes bends" and not "Mercedes Benz."
Deep Thought
The woman's mind has been "twisted" by Tiffany, the super-expensive jewelry store with the iconic blue-green boxes. Tiffany is a total status symbol for the wealthy. She also has a case of "the bends," also known as decompression sickness. You get the bends, for example, if you surface too fast while scuba diving. But the speaker makes a clever pun: her case of the bends is caused by the expensive car, the Mercedes Benz. Basically, her whole worldview is warped by money.