S-430 Buy or not Tips?

Hello together, am newcomer in the forum and “Autokauf und Technik- Greenhorn” I am thinking about just getting me a used S-430… Built 2003 87000 km run.. what do you have to pay attention to? Originally I had planned a ML 400 but you have suffered so much in the forum that I heard more than fleas cough during the test drive… Gearbox etc., so that I let it be better… so what is wrong with S- 430 .. can you do a lot wrong. en mortals (with my possibly stupid question)… but honestly with your assessment of the subject. Many thanks to everyone who answers me