How easy to maintain are these used and what quirks are to be expected?

Hello community. In the near future we are planning to buy a “young used” since we have got offspring and the chassis and the attachment for our pram almost completely filled the trunk of our Clio 3. Planned is a combination in the golf class or lower middle class with diesel engine. So Golf, Focus, Megane, Astra or Laguna, Passat, etc. Also possible are Caddy, Kangoo, Belingo and co until year 2010-2014. My question about these cars is now the following. How Wartun So how elaborate is the change of timing belt, lamp change, etc? What are the flaws? For example, I had to partially dismantle the bumper at the Clio to change a lamp… Such information would help us a lot. I know that I also find out about the search for flaws of these vehicles. But I would like to have this information at a glance to not show my wife a thousand pages and then make a decision with her.PS:Please no contribution. e alla “Opel I find shit…e” or something…