I drive mine about 2,500 miles per year. I suggest putting about 500 miles on it in "non-critical" driving. That is, if something breaks and you don't reach your destination, it's no big deal. Through this testing period you should measure oil usage rate, check all fluid levels every 100 miles, ensure all lubrication is done, and carefully listen and feel for problems. After those miles, you should have confirmed if the car really is "mechanically up to speed".
Enjoy your new car!
Rodd
Powell, Ohio, USA
1966 230SL, Euro, Auto, Leather, both tops
1994 E420