Hi there
Welcome to the SL forum.
The US guys will give you loads of info on what to look out for, as many of the issues in the 380 concern the US - "non-Euro" models, such as timing chains, CAT's, aircon etc but my comment is:
Cruise and enjoy.
I guess the first thing though is to get either a workshop manual or a set of CD's ( from ?Bay? or a US member of the forum) unless of course there's one with the 380? and then put her through a thorough "service" not forgetting to change the fuel filter (next to the fuel pump near the back axle).
As to the rest, well best to drive it first and see what ( if anything) is wrong.
Cheers
Jim