Well even my data system doesn't give that kind of information when I buy batteries I just go to the store so I need a battery for this particular car and they sell me one to put it in.but if you're worried about losing memory and stuff get one of those cheap little $14 memory savers Amazon sells plug it in the cigarette lighter and it'll keep the memory from going bad

measure your battery tray and then web search for "battery group size dimensions"

Sorry I wasn't specific enough. What I meant to say is my current battery is in a very poor state, so I want to know exactly before I start removing it, with the new battery at hand so I don't end up opening the locking mechanism and have to deal with problems like the windows open part way with no easy way to put them up, which has happen to me before. Perhaps some one with access to AllData or a Peugeot internal database. Thanks

You take the battery to the shop for core refund. correct?