Would also like to get me a R230 on what do I have to pay attention ?

Hello community, as I said before, I want to get a used R230 from 2007 onwards, a 350-er without ABC. Now I know what I don’t have to have, but what should I be aware that I might miss later. I have been reading this forum for some time, maybe one or the other has a tip at hand. Greetings