Special thanks to my parts specialist of my dealer in Germany, he extra ordered 1 plug for me from Munich and sent me the pics. Part number of the plug which goes onto the EML throttling valve is position 21 8 POL. 12521714053.
A bit confusing as there are engines mentioned which do not have a EML DK, E31 is not mentioned at all, but look at the pics. http://www.realoem.com/bmw/showparts...12&fg=31&hl=31
Most probably it will also fit on E34 535 with EML, please check the pics
Here the pics
http://s71.photobucket.com/user/shog...ml?sort=4&o=16
http://s71.photobucket.com/user/shog...ml?sort=4&o=17
Shown here on an M70 E32
http://bmwe32.masscom.net/sean750/V1...crewdriver.jpg
http://bmwe32.masscom.net/sean750/V1...ctorByHand.jpg
http://bmwe32.masscom.net/sean750/V1...KConnector.jpg
Additional info, in case you are confused which pin goes where:
X1618 and X1619
x1618 --> 1619:
1 - rt - ws - ge --> rt
2 - sw - ws - ge --> sw
3 - gn - ws - ge --> gn
4 - nc --> nc
5 - ws - ge --> ws
6 - ge --> ge
7 - sw --> sw
8 - nc -> nc
http://shark.armchair.mb.ca/~dave/BMW/e32/e32_89.pdf