The wifey's 1993 300E 124.028 broke down on the highway today. Car has about 140K miles. Bad noises from under the hood. She limped it off the Dallas North Tollway to the nearest bar (she was in Addision - that's all they have there) and shut it down.

When I checked under the hood the engine was covered in small metal flakes. Everything else looked normal. All fluid levels up to spec, all parts appeared to be present and accounted for. Started it up and at idle it made a slight knock-knock noise from something on the serpentine belt - couldn't tell what - but it didn't really sound all that bad.

Any guesses? I don't have time to deal with it, so a local indy is getting the work. I'm thinking fan bracket bearing is most likely.