Hi, I been driving my VOLVO s80 2.5TDI for a year now, and finaly decided that stock headlight isn't nice enough. Thought about converting to xenon headlights from newer model. My question is, is it hard to convert hologen headlight from non facelift model, to xenon headlight from facelift. From what I heard, the headlight shape and mounting points are the same ant headlight have just a diferent wiering harnes, that plugs into stock harnes. Is what I heared true, or is it a lie and I will need to do some hackery and make them fit and work properly?