The last couple of days when I start my smartie it makes a rumbling noise from the back. This evening when was driving home form work the engine light came on. I just had it in for the 30,000 mile tuneup and am disgusted. It also needed a new starter at that time so it was towed 2 hours to the nearest dealership! Any thoughts on my current engine light or do I need to drive it back to the dealership--2 hours. Should I drive it?