is this amp compatible

is this amp in the link below compatable with the l322 hi set up ? the plug is the same fitment
NEW HIFI AMPLIFIER BMW SERIES 3 E90 E91 E92 e93 on eBay (end time 29-Aug-10 21:25:27 BST)

I would be vary wary. It may look identical, but my experience has proved they are not. I went down this route on my p38 and bought a amp to replace my blown one. It was identical in every detail apart from the fact it would only power the front speakers and nothing else. No sat nav, no cd player .....