Cruise Control help please

CJK said:
I'm trying to talk myself into doing this job on my '07 Z4 3.0, which is going to involve installing the loom. I fancy my chances apart from the bit where I have to establish what pin goes where in the DME. Anyway, what I'd love to know is why BMW decided to stop pre-wiring post '04 cars. The optimist in me says that they were just trying to save a few pounds by not putting in pointless wiring, but I do wonder if it was a cynical decision in order to make retrofits harder...
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I've done the retrofit on a 2007 Coupe at the same time as a few other people, and it was pretty easy once we'd figured out which pin on the DME. There is a thread on it here:

http://www.z4-forum.com/forum/viewtopic.php?f=2&t=15323&p=231342&hilit=cruise+control+pin+which#p231342
 
Cheers glastoveteran, that's really helpful. Especially the info as to which box the socket is in... It does seem that of the people on here with the N52 engine, some have succeeded with pin 4, others with pin 39, which is still a source of confusion for me. At least that narrows it down to only two options :P

I'm sure I'll be back in a month or two when I'm doing this job and my car's in bits!
 
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