Date registered: Feb 2008
Vehicle: 2004 W220 (S430) ; 2001 R129 (SL500) Sport
Location: Alabama Gulf Coast--formerly Charlottesville, VA
Mentioned: 0 Post(s)
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I can't say whether your car has cooked the motor, but I had a similar experience in a SAAB 9000. The symptoms were exactly the same as you describe; no piston hanging out the side of the block, no puddle of oil or coolant--just dead. The oil pump had packed up and the engine was seized. No repair possible--replace the motor or junk the car. I hope that's not what happened to you.
"Don't pick a fight with an old man. If he is too old to fight, he'll just kill you."--John Steinbeck