Google is very bad translation from German, but when I realized the problem - you do not turn on the fuel pump when the ignition or never?
in any case, you should check the computer supply.
take the lamp, 21-55W, attach two wires to it.
one wire lamps put on the negative battery, a second test pins 27,39,40 ECU connector (1) - the lamp should burn brightly (ignition on)
You can also check minus the computer: one to connect one wire to the lamp, plus a battery and a second wire test pins 32 and 33 - the lamp should burn brightly.
also you should check the fuel pump relay (relay green).
Here is a
wiring diagram for 111.960 , to help you