Mercedes R129 Front Lighting Wiring Harness / Loom 1295400506 Posted on August 30, 2023 by admin Removed from a 1994 280sl. All complete and in good order other than the four wires to the horns have been cut and will need new connectors. (Photo) this loom feeds the headlights, indicators, fog lights, thermostat and horns. Posted in mercedes Tagged: front, harness, lighting, loom, mercedes, r129, wiring.