Hi billofdurham - thank you so much for your suggestion. We actually managed to get the car started and it's back in our driveway. The fact that it started made it all the more mysterious, but this all makes sense after reading your post. I'll post again if this is the fix - thank you so much!

Hi Everyone - The gas tank of my 1990 240DL was (somehow) filled with water a few months ago. We thought we drained it at that time, then filled it with gas, and my husband managed to drive the car 3 hours from Knoxville to Nashville. It did fine, until we pulled off the interstate for a stop; it ha...