Description
OEM reference A0004640618. A genuine used, tested Mercedes-Benz W203/W209 clock spring spiral cable — a single OEM unit covering both the C-Class (W203) and CLK-Class (W209) platforms.
Known variously as a spiral cable, rotary coupler, or squib, the clock spring is a coiled flat-ribbon conductor housed in a moulded plastic cassette positioned between the steering column and the steering wheel hub. As the wheel turns from lock to lock, the internal ribbon coil winds and unwinds to keep every electrical connection unbroken — serving the driver airbag firing circuit, the horn relay, and all wheel-mounted switches including cruise control, audio, telephone, and paddle-shift inputs. Its role in the driver airbag circuit classifies it as a safety-critical part.
A clicking, crunching, or grinding noise when turning the steering wheel to full lock; an SRS or airbag warning light illuminated on the instrument cluster — the most critical symptom, as it may indicate a broken driver airbag circuit; horn failure or intermittent horn; complete loss of all steering wheel control functions (audio, telephone, cruise control); or visible damage to the internal ribbon conductor.
Safety-critical part. Professional installation is required — the airbag pyrotechnic circuit passes through this unit and incorrect installation can prevent the driver airbag from deploying in a collision. After fitting, all SRS fault codes must be cleared using appropriate diagnostic equipment. Verify the OEM number against your exact vehicle before ordering. 14-day returns accepted on unmodified parts.
Returns accepted only for genuine faults — faulty on arrival, not as described, or wrong part supplied — requested within 14 days, with all 3 anti-tamper stickers intact. No returns for change of mind, incorrect installation, coding/programming, or buyer compatibility errors; checking compatibility (OEM number, firmware, vehicle) is the buyer’s responsibility. Full policy: https://giantparts.eu/refund-and-returns/
