Multifunction relay / fuel pump relay for Mercedes A work relay, also known as power relay, is an electrical component which makes it possible to control a power circuit using a low power control signal. For vehicles with right direction (RHD) For vehicles with steering on the left (LHD) Designates the number of pins or wires present on the electrical outlet. Mercedes-Benz: 002 545 20 05, 002 545 21 05, 0025459205, 0025459305, 003 545 13 05, 003 545 17 05, 003 545 19 05, 003 545 20 05, 003 545 24 05, 003 545 38 05, 0035450005, 0035451105, 0035451905, 0035452005, 0035452405, A 002 545 20 05, A 002 545 21 05, A 003 545 13 05, A 003 545 17 05, A 003 545 19 05, A 003 545 20 05, a 003 545 05, A 003 545 38 05, A 0035451105, A0025459205, A0025459305, A0035450005, A0035451905, a0035452005, a003545.