Rlg

Hi, usual newbie apologies apply. Is there an easy way to identify if a model is post or pre mid-life facelift? I read differing views that the is220d had a change in 2008/2009. The model I am looking at buying is a used October 2008 model from Lexus themselves. Their site states it has 175ps, 400Nm, 168g/km. Will it have the same gearbox everyone seems to question? Would anyone advise getting a later model? Thanks in advance.