Originally Posted by ah-kay

I don't think your timing chain broke or snapped. MBZ diesel engine is interference engine and all valves would be bent out of shaped if it did snap. Engine will NOT run. I suspect it is something simple. The valve cover cracked for some reasons ( need to find out ) and oil get onto the turbo or exhaust to cause the burning smell, BTDT. Just remove the cover, remove all debris, turn the engine by hand and check for any foreign objects. Good luck.

btw: I seriously doubt the timing is jumped.