@ Fabs (Allgemein)
Hello Fabs.
I've found the info about how to connect the intensive wash system to the existing windshield washers. The EBA is for the E30 series, but the diagram for the hoses and valves under the hood should be identical for the E28. Part numbers for the valves should be in the E30 ETK.
Here is the link:
http://www.m535i.org/e28info/headlightwiwa/EBADoc33906_E30headlight_IntWiWa.pdf
I hope the info is useful to you.
