e90 330i 2007 pre lci

[Moar]

I have a few questions which I'm struggling with.

Can anyone point me to a sticky that pin points what to look out for on the N52 engines.

Also what is MOST exactly ? I tried googling but I'm struggling? Is most related to pre lci post lci? OR is it related to the kline or dcan cars?

I want to fit a dension500 to it and I am pretty sure my car doesn't have a cd changer , am I right in thinking the dension500 just goes in the back? There is no taking out the head unit at the front etc?

I am not bothered about the coding bit as I can do that all myself etc?

Just some pointers I need as I've read so much on this forum but getting lost between pre and post LCI !

Thanks gang!