IRD said:Marlon
Do you know if the wiring harness you used to connect your seats is still available?
I am having the same issues as you had. I thought my 2005 car would be pre-wired but unfortunately it isn't.
Kind Regards
Hi,
FishyDave sourced the looms from the USA - I think they were X3 looms. He then matched them to the Z4.
I'm not sure if he bought one or two extra. Your only other choice is to find one from a breakers, but I found that impossible because they fly out with the M Seats.
As Mark has mentioned the full details are earlier in this thread :
There are several threads detailing what a PITA it was to swap from standard manual non-heated seats to M heated electric ones in a face-lift Zed

http://www.z4-forum.com/forum/viewtopic.php?f=2&t=86176&hilit=saga