What market are you in that you are running a B230ET with Motronic? I have never seen one but there is a schematic for it in the book. If the pumps run continuously then I can only assume that they are being powered up via the relay. The relay gets it's power through fuse #1 which is hot all of the time. When the key is turned on it provides power to the first coil in that relay which is permanently grounded, this closes the first set of points which allows current to the second coil, when the control unit sees an engine speed signal it will ground the other side of the second coil and close the points which should allow power through to fuse 11 which feeds both or your pumps. All that technical mumbo jumbo being said I would look for a grounded yellow/black wire on the bottom side of that relay, should be in position #4. If you ground that wire the pumps will run any time the key is in the on or run positions.

This is a pretty typical fault in the '89-'90 year model 700 series cars but they were all LH. Do the Motronic units have the same problem? I do not know. Is this a problem? Well if you run the car into a phone pole and you are trapped in it and the fuel pumps are pumping fuel all over the ground and you die a fiery death because of it, well then yes I guess it is a problem. Otherwise don't worry about it and run it the way it is. Myself though, I would fix it.

Mark