300 GE 1991 What to pay attention to when buying (does not give so much clues)

Hello, I am interested in a 300 GE, after I first introduced the 300 GD. I know the problems with ABS sensors at 190E from the middle years of the year. Is there such a thing with the G ́s too? Where does the engine oil, what does it look like with ATM transmissions? If everything turns soft OK? Rust at BJ 1990 and shortly following? How can one try the locks when buying without “swipe up much dust?” Are the petrolers with a cold start control retrofitted afterwards to Euro 2 standard as well as What about the valve seats? Are they “on” after 150000km so that a lot of oil is consumed? Are there problems with the fuel supply (nozzles, holding valves, pump, cold start valve?) so that the engine may have start problems or a restless idle? Here it seems that the newer, very large models are discussed. See many numbers like 400, 500 and CDI models 🙂 Thank you for your answers.