1704600049 Mercedes-Benz W210 Clock Spring Spiral Cable Airbag Steering Wheel OEM Used & Tested

Descriere

OEM reference 1704600049. A genuine used, tested Mercedes-Benz W210 E-Class clock spring — the ribbon coupler that carries all electrical signals between the steering wheel and the fixed body harness.

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.

Horn failure or intermittent horn operation; driver airbag or SRS fault light on the dashboard — the most urgent sign, pointing to a broken airbag circuit that may prevent deployment; steering wheel-mounted audio, phone, cruise and paddle-shift controls all becoming unresponsive; a clicking or grinding sensation when the wheel is turned to full lock; or apparent damage to the ribbon conductor itself.

Safety-critical. A qualified technician must perform the installation — the airbag pyrotechnic squib is wired through this unit, and incorrect fitting may prevent airbag deployment in the event of a collision. All SRS fault codes must be reset with diagnostic equipment after replacement. Confirm the OEM reference against your vehicle’s exact specification before ordering. 14-day return window on unmodified parts.