Was it sitting in Va or FL. If the coolant froze you could be in trouble. you can do a leakdown test to see if that tells you something. It may or may not since the compression may be good and the cylinders not affected by the leak. It is worth a try for sure.
Does it have oil in the coolant or vice versa, or both. Its important to find out. If its oil in the coolant it could be transmission fluid. Then you need a new radiator and a trans flush.
Dont drive it either way, or else something will be ruined for sure.

__________________

Chris
84 280sl
82 300d euro