99 ML 320 with about 175K miles. Wife called and said it would turn over but not fire. I had her call roadside assistance first. They told her to get out of the truck, lock it with the remote, unlock it, and then try to start it again. They said that would reset the computer. Well, it worked.

Now, what should I worry about? Should there be a code to explain this malfunction? Do you think I should have a professional go over the truck to see if they can find anything?

Thanks in advance.