Will need some on this one...

[cnavarro]

Was your coolant temp gauge working at all previously? If the coolant tank was low (or empty in your case), it should have been flashing on the dash. Unfortunately, I think you ran the engine dry (no coolant) probably way too long. It's probably fried. If it still runs after it's put back together, don't be surprised if you suffer a cylinder failure or other issue with the engine necessitating a complete rebuild.

[urban_legend]

Other than saying a prayer to the autobahn gods - best next step.

Start with replacing the coolant pump and gasket. Or take it to the dealer and hope for the best.

btw - on another forum I found the same problem. Some noise at start up, the pulley coming loose and steam from vents with no overheating warning lights.