Whenever the mixture is massively wrong such as when you change fuel distributors you should remove the injection lines and dab the fuel from each hole with a clean cloth. Jump the fuel pump relay and watch the fuel in the threaded holes. I am presuming that fuel will flow, it shouldn't as the engine has no air flow.
If it is flowing use the three millimeter allen adjustment. back the screw off (push down on the adjuster and seek the actual screw adjustment and move counterclockwise) until fuel no longer flows. Adjust it again clockwise till it flows and back off till it JUST stops. Now reassemble and try. Final adjustment is done first by ear to achieve good running and then electronically using the duty-cycle of the frequency valve at terminal 3 of the diagnostic socket.
Bosch Master, ASE Master, L1
33 years MB technician