stavka...in the scene you're referring to, Michael approaches Calo in a little 'room' outside the house, where he is 'snacking' on wine & cheese.

After telling Michael where Appolonia is and then saying she'll make a 'good American wife' (making Michael genuinely smile for one of the few times in both films), he says he'll put the bags into the car.

When we do see Appolonia in the car shouting to Michael that she'll drive him, Calo can be briefly seen bringing the bags to the trunk.

It seems virtually impossible that he could've loaded the suitcases and walked far enough from the car to survive the explosion which happened only seconds later.

That is why the only serious explanation for his 'survival' was the chance to bring another GF actor back to play a 'reunion' role in Part III.

Apple