On the highway last night driving home my ses light came on but nothing felt or sounded wrong, until I got off my exit and stopped at the end and the rpm's dipped to 500 and my car felt like it was about to die. Normally the idle is about 700-750. I tried parking it and letting it sit for a few minutes then starting it again and the light came right back on and I was idling at about 600. Now every time I come to a stop I get a rough idle. Theres no hesitation when it comes to acceleration. Would it be something fuel related? Thanks for any input.

'02 GLE w/ 78K

 

When my light came on it was because of the O2 sensor

 

If the light is on, go to Autozone and get it scanned, then come back and post the codes you get. People here will then know what problem you have.

 

go to Autozone