hi guys,

been searching for a bit on the forum and cant find the answer im looking for....ive just brought a 2008 520d business touring and I'm thinking of upgrading the satnav and screen....ive saw the excellent how to guide that's on here and have a question which may or may not be completely daft....ive been searching for cic head units on ebay and have seen quite a few on there, my question is will any cic head unit fit in my car or do I have to buy one specific for my model?...there are some on there for f30 and e91 etc. thanks in advance