DISCLAIMER:- OK, this is VERY important. Read the How-To, then read it again and then read it a third time. Make sure you perform EVERY step as it is written down, do not miss a step, and do not think you know better!!
If you do something wrong at best you'll receive an error message, at worst you could screw up the coding of your car. I cannot stress this enough this is serious stuff, only attempt this if you think it is something you can do.
Edit** A BRAND NEW (updated and more informative) how-to full walk through video for parts, install, coding and demo is now available..... https://www.youtube.com/watch?v=Xjbddx24aqE&t=
If anyone is interested in this retro-fit I've managed to collate all the information in two Word documents (1st is the physical installation and the 2nd is the coding stages). They are mainly other peoples work but just all together with some additional information especially for the e89.
They are on my DropBox account ....
Part 1 >> https://www.dropbox.com/s/3qj1ty50rgpjfbz/BMW Z4 e89 Cruise control retrofit part 1.pdf?dl=0
Part 2 >> https://www.dropbox.com/s/u20zvkfwc91bww1/BMW%20Z4%20e89%20Cruise%20control%20retrofit%20part%202.pdf?dl=0
(Part 2 now includes links to new profiles and SPDaten files as well as instructions on how to load them and a new final process step)
I hope that is of help to someone.
Just as a heads-up for purchasing your Cruise stalk assembly.....
DON'T just search for one that is labelled as e89 as sellers seem to increase the price of these just because it's a Z4.
Instead put in your search e90 as this should bring up the exact same stalk as for the e81, 82, 87, 88, 89, 90, 91, 92 and 93. These are all the same fitment with the only other item to watch out for is the "A" symbol on the wiper stalk if you have auto wipers, if not then you just have the windscreen with the 3 dashers underneath symbol (if you have trouble here you CAN buy any stalk assembly but then have the wrong symbol and no LED)
Hope that helps.
EDIT - Attached photos showing the Standard cruise Stalks (Right side stalk with the 3 dashes) and the Auto Wiper stalks (Right stalk with the "A" on it and an LED)
You CAN actually run auto wipers with a standard stalk if that is all that you can find.


If you do something wrong at best you'll receive an error message, at worst you could screw up the coding of your car. I cannot stress this enough this is serious stuff, only attempt this if you think it is something you can do.
Edit** A BRAND NEW (updated and more informative) how-to full walk through video for parts, install, coding and demo is now available..... https://www.youtube.com/watch?v=Xjbddx24aqE&t=
If anyone is interested in this retro-fit I've managed to collate all the information in two Word documents (1st is the physical installation and the 2nd is the coding stages). They are mainly other peoples work but just all together with some additional information especially for the e89.
They are on my DropBox account ....
Part 1 >> https://www.dropbox.com/s/3qj1ty50rgpjfbz/BMW Z4 e89 Cruise control retrofit part 1.pdf?dl=0
Part 2 >> https://www.dropbox.com/s/u20zvkfwc91bww1/BMW%20Z4%20e89%20Cruise%20control%20retrofit%20part%202.pdf?dl=0
(Part 2 now includes links to new profiles and SPDaten files as well as instructions on how to load them and a new final process step)
I hope that is of help to someone.
Just as a heads-up for purchasing your Cruise stalk assembly.....
DON'T just search for one that is labelled as e89 as sellers seem to increase the price of these just because it's a Z4.
Instead put in your search e90 as this should bring up the exact same stalk as for the e81, 82, 87, 88, 89, 90, 91, 92 and 93. These are all the same fitment with the only other item to watch out for is the "A" symbol on the wiper stalk if you have auto wipers, if not then you just have the windscreen with the 3 dashers underneath symbol (if you have trouble here you CAN buy any stalk assembly but then have the wrong symbol and no LED)
Hope that helps.
EDIT - Attached photos showing the Standard cruise Stalks (Right side stalk with the 3 dashes) and the Auto Wiper stalks (Right stalk with the "A" on it and an LED)
You CAN actually run auto wipers with a standard stalk if that is all that you can find.

