Radiator Coolant Water Level Sensor Switch Replacement for Mercedes-Benz Actros Atego Axor Citaro Trucks & Buses | OEM 9425420217 9425420017

Product Overview The 9425420217 / 9425420017 Coolant Water Level Sensor Switch is a high-accuracy electro-magnetic signaling component engineered as a premium aftermarket replacement for Mercedes-Benz commercial trucks, fleet logistics transport, and transit city buses. Positioned within the radiator expansion header tank, this fluid monitor keeps a continuous log of antifreeze volumes. If structural fluid levels drop below calibrated safety limits due to a line rupture or system burn, it immediately triggers the dashboard cluster light to protect the powertrain against critical overheating, warped gaskets, and seized pistons. Technical Specifications Primary Mercedes-Benz OE Reference Codes: 9425420217, 9425420017, A9425420217, A9425420017, 942 542 02 17, 942 542 00 17 Extended Production Cross-References: 942542021705, A942542021705 Component Type: Radiator Surge Tank Antifreeze Level Sensor / Low Coolant Warning Switch Chassis Connector layout: Factory standard terminal blade configuration for plug-and-play fit Condition: Brand New Premium Aftermarket Replacement Vehicle & Fleet Compatibility This coolant indicator pin is engineered with standard thread specifications, offering seamless fitment across early-to-mid generations of Mercedes-Benz heavy commercial architectures and public transit fleets: Vehicle Model & Fleet Family Year Range & System Fitment Details Mercedes-Benz Actros (First Generation) 1996 – 2003 heavy cargo models (e.g., 1840, 2040, 2540, 3340, 4140 V6/V8 powertrains). Mercedes-Benz Atego & Axor 2 Series Fits medium-to-heavy rigid chassis and regional distribution multi-axle tractors requiring standard coolant loop triggers. Mercedes-Benz Econic Series Fits low-cab vocational setups, municipal waste transport, and airport utility models. Mercedes-Benz Citaro & Conecto Buses Widespread integration across municipal low-floor city transit and intercity passenger coach platforms. Performance Benefits Anti-Shedding Wave Filtering: Sophisticated internal magnetic floats minimize false warning flicker generated by heavy cabin vibration or rapid cornering fluid sway. High Thermal Tolerances: Formed from glass-reinforced, injection-molded polymers to resist deterioration from constant boiling glycol contact and scaling additives. Drop-in Leak Isolation: Molded to 1:1 factory parameters, equipped with an industrial-grade rubber base seal ring to safely resist cooling block expansion counter-pressures. Maintenance Tip: In heavy commercial fleet runtime routines, if your Mercedes-Benz Actros or Atego displays a recurring low-fluid error on the dash dashboard cluster while the expansion tank is completely filled, the internal contact pins of the 9425420217 sensor are highly likely shorted or scale-insulated. Over years of transport duty, mineral deposits shield the sender probe, blocking communication loops. When replacing the aftermarket unit, ensure the radiator pressure has bled off completely, clear any debris out of the tank neck thread, and press the harness clip firmly in place to provide a dust-proof and moisture-sealed electronic layout.