Mercedes-Benz Patent Replaces Taillight Wiring with Spring Contacts to Simplify Tailgate Harness

Mercedes-Benz has recently been granted a new patent for a taillight design that replaces traditional flexible wiring with a spring-loaded mechanical switch to address the complexity, bulkiness, and vulnerability of wiring in tailgates. In this design, physical contacts automatically complete the circuit when the tailgate is closed, powering the taillights mounted on it, and disconnect the power when opened. This solution is particularly suitable for vehicles whose taillights are split by the tailgate—such as the GLS—as it eliminates the need for lengthy wire harnesses routed through conduits, thereby reducing weight, lowering costs, and minimizing potential failure points. Although spring-based electrical conduction technology isn't entirely new, ensuring reliability in the high-dust, high-humidity environment of automotive tailgates requires robust protection and self-cleaning capabilities. Currently, no Mercedes-Benz model features this design, and the patent approval doesn't necessarily mean immediate mass production.