Hi, Thanx for your replies! Problem is solved for now ! As I said, the passenger seat worked directly perfectly fine, both the electrical settings and the heating were just "plug and play". Concerning the driver's seat, even though the heating fucntion was working, there elctrical settings remained un powered. For know I've just link the main power of the seat to the back cigarette lighter, and everything works well (even the memories!). My guess is that I'm missing a relay somewhere. I will drop the car off to the dealer to see if they can finish off the install. My second concern know is that the bakc row was fitted with heating system, and the main cable from the xar had the plugs. I've connected them, and I wonder of I could properly located the plug for the switches (At a rapid first glance as I plug the elctrical cigarette lighter to the front seat nothing realy stuck out !). I'll post picks soon for those of you that are curious, but all in all, it's quite a straight forward change. I found my seat on Ebay, from a very nice an polite german dealer. It cost me arround 1200 €, and the swap took me a little over 3 hours !

Have a nice week end !

__________________
Current:
2008 RRS TDV8
2007 BMW M6
2005 BMW X5 3,0d
2001 Smart Fortwo cabrio
1987 VW Golf 2 GTI 16v
1969 Fiat 500L

Past -
a Few nice ones ;-)