{"title":"Parking Sensors \u0026 Parktronic","description":"\u003cp\u003eUltrasonic Parktronic sensors for Mercedes-Benz — the part that fails when your parking aid beeps for nothing, drops out, or goes dead entirely.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSold in packs\u003c\/strong\u003e — singles for one known-bad sensor, or 4, 6 and 12-packs for doing a bumper properly while it is already off.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment confirmed first\u003c\/strong\u003e — several Mercedes sensors look identical and are not interchangeable. Send your VIN or the number moulded into the old sensor and we will check before you order.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1-year warranty\u003c\/strong\u003e and free shipping from California.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eNot sure which sensor has failed, or whether it is the sensor at all? Start with our \u003ca href=\"\/blogs\/repairs-diagnostics\/mercedes-parking-sensor-beeping-constantly\"\u003eParktronic diagnosis guide\u003c\/a\u003e — it takes two minutes and saves buying a part you do not need.\u003c\/p\u003e","products":[{"product_id":"a0009055504-pdc-parking-sensor-for-mercedes-benz-parktronic","title":"Mercedes Parktronic PDC Parking Sensor A0009055504 – Single, 4, 6 \u0026 12-Packs","description":"\u003cdiv style=\"max-width: 900px; margin: auto; font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif; padding: 20px; line-height: 1.7; color: #222;\"\u003e\n\n\u003cp style=\"text-align: center; background: #eff6ff; padding: 14px; border-radius: 10px; font-weight: 600; margin-bottom: 26px;\"\u003eGenuine-spec replacement for A0009055504 • 3-pin connector • Matte black, paint to match • Free shipping from California\u003c\/p\u003e\n\n\u003cp\u003eIf your Parktronic beeps for nothing, drops out intermittently, or one zone has gone dead, it is usually a single failed ultrasonic sensor rather than the control module. This is a new direct replacement for the \u003cstrong\u003eA0009055504\u003c\/strong\u003e, the sensor Mercedes fitted across most of its 2014-onward range.\u003c\/p\u003e\n\n\u003ch2 style=\"margin: 30px 0 12px;\"\u003eRead This Before Choosing a Pack\u003c\/h2\u003e\n\u003cp\u003eMercedes does not use one sensor part number per car. On a six-sensor bumper layout the factory split is:\u003c\/p\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 15px; margin-bottom: 14px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background: #1e40af; color: white;\"\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #ddd; text-align: left;\"\u003ePosition\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #ddd; text-align: left;\"\u003ePart Number\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #ddd; text-align: left;\"\u003eThis Listing\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eRear — all positions\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eA0009055504\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd; color: #15803d; font-weight: 700;\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eFront — inner\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eA0009055504\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd; color: #15803d; font-weight: 700;\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #fff5f5;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eFront — outer left \u0026amp; right\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eA0009055604\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd; color: #b30000; font-weight: 700;\"\u003eNo — different part\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"font-size: 15px; color: #444; margin-bottom: 26px;\"\u003eSo a full front-and-rear refresh on a twelve-sensor car typically needs ten of these plus two A0009055604 front outers. \u003ca href=\"mailto:benzunitedparts@gmail.com?subject=PDC%20Front%20Outer%20Sensor%20Enquiry\" style=\"color: #b30000; font-weight: 600;\"\u003eMessage us for the front outers\u003c\/a\u003e and we will sort the pair separately. Layouts vary — some cars run four rear only.\u003c\/p\u003e\n\n\u003ch2 style=\"margin: 30px 0 12px;\"\u003ePack Pricing\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 15px; margin-bottom: 8px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background: #1e40af; color: white;\"\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #ddd; text-align: left;\"\u003ePack\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #ddd; text-align: left;\"\u003ePer Sensor\u003c\/th\u003e\n\u003cth style=\"padding: 10px; border: 1px solid #ddd; text-align: left;\"\u003eTypical Use\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eSingle\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e$14.99\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eOne known-bad sensor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f8fafc;\"\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003e4-Pack\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003e$7.49\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eFour-sensor rear bumper\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e6-Pack\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e$6.66\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eSix-sensor rear bumper\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003e12-Pack\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003e$5.42\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eRear plus front inners, or a shop stocking up\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"font-size: 14px; color: #666; margin-bottom: 26px;\"\u003eCount the sensors in your bumper before ordering. Sensor count varies by model and options package.\u003c\/p\u003e\n\n\u003ch2 style=\"margin: 30px 0 12px;\"\u003eConfirmed Applications\u003c\/h2\u003e\n\u003cp\u003eA0009055504 is documented across the following chassis. Build date and options still decide the exact number your car left the factory with.\u003c\/p\u003e\n\u003cul style=\"columns: 2; column-gap: 30px;\"\u003e\n\u003cli\u003eA-Class — W176\u003c\/li\u003e\n\u003cli\u003eB-Class — W246\u003c\/li\u003e\n\u003cli\u003eC-Class — W205 \/ S205 \/ C205 \/ A205\u003c\/li\u003e\n\u003cli\u003eCLA — C117 \/ X117\u003c\/li\u003e\n\u003cli\u003eCLS — W218 \/ C218 \/ X218\u003c\/li\u003e\n\u003cli\u003eE-Class — W212 \/ S212\u003c\/li\u003e\n\u003cli\u003eE-Class — W213 \/ S213\u003c\/li\u003e\n\u003cli\u003eE-Class Coupe \/ Cabrio — W207 \/ C207 \/ A207\u003c\/li\u003e\n\u003cli\u003eGLA — X156\u003c\/li\u003e\n\u003cli\u003eGLC — X253 \/ C253\u003c\/li\u003e\n\u003cli\u003eML \/ GLE — W166 \/ X166\u003c\/li\u003e\n\u003cli\u003eGLE Coupe — C292\u003c\/li\u003e\n\u003cli\u003eS-Class — W222 \/ V222 \/ X222\u003c\/li\u003e\n\u003cli\u003eS-Class Coupe \/ Cabrio — C217 \/ A217\u003c\/li\u003e\n\u003cli\u003eSL — R231\u003c\/li\u003e\n\u003cli\u003eV-Class \/ Vito — W447 \/ W448\u003c\/li\u003e\n\u003cli\u003eAMG GT\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"font-size: 14px; color: #666; margin-bottom: 26px;\"\u003eAlso supersedes 0009055211 and 000905521105. Written without the A prefix as 0009055504.\u003c\/p\u003e\n\n\u003cdiv style=\"background: #fff8e1; border: 1px solid #ffd54f; border-radius: 10px; padding: 18px 20px; margin: 30px 0;\"\u003e\n\u003cp style=\"margin: 0 0 8px; font-weight: 700; font-size: 16px; color: #7a5900;\"\u003eCheck your number, not just your model\u003c\/p\u003e\n\u003cp style=\"margin: 0 0 10px; color: #5c4400;\"\u003eSeveral Mercedes ultrasonic sensors look nearly identical and overlap on the same cars — \u003cstrong\u003eA0009055504, A0009055604, A2125420018, A2215420417\u003c\/strong\u003e and the newer colour-coded \u003cstrong\u003eA2239054000\u003c\/strong\u003e. The same model year can carry a different number depending on build date, position and options.\u003c\/p\u003e\n\u003cp style=\"margin: 0; color: #5c4400;\"\u003ePull one sensor and read the number moulded into the body, or \u003ca href=\"mailto:benzunitedparts@gmail.com?subject=PDC%20Sensor%20Fitment%20Check\" style=\"color: #b30000; font-weight: 700;\"\u003esend us your VIN\u003c\/a\u003e. Two minutes now, and it is the single most common reason these get returned.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2 style=\"margin: 30px 0 12px;\"\u003eSpecification\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e3-pin connector, matte black housing\u003c\/li\u003e\n\u003cli\u003eUltrasonic detection matched to factory range and response\u003c\/li\u003e\n\u003cli\u003eSeats in the factory bumper retainer ring\u003c\/li\u003e\n\u003cli\u003eNew and tested — not refurbished or pulled\u003c\/li\u003e\n\u003cli\u003eSupplied unpainted, as Mercedes supplies them\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2 style=\"margin: 30px 0 12px;\"\u003eCommon Questions\u003c\/h2\u003e\n\u003cdetails style=\"margin-bottom: 14px; border-bottom: 1px solid #eee; padding-bottom: 14px;\"\u003e\n\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eHow do I find which sensor is bad?\u003c\/summary\u003e\n\u003cp style=\"margin: 12px 0 0 20px; color: #444;\"\u003eWith the ignition on and the system armed, rest a finger lightly on each sensor. A working one gives a faint rapid tick you can feel and sometimes hear. A dead one is silent. If you have a scanner that talks to the Parktronic module it will name the position outright — a generic OBD-II reader will not, since Parktronic sits on a separate bus. You can also swap a known-good sensor into the suspect position and see whether the fault follows it.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 14px; border-bottom: 1px solid #eee; padding-bottom: 14px;\"\u003e\n\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eDo they need painting?\u003c\/summary\u003e\n\u003cp style=\"margin: 12px 0 0 20px; color: #444;\"\u003eYes — Mercedes supplies these unpainted and specifies painting before installation. Keep the coat thin. Ultrasonic sensors stop working reliably under a heavy paint build, so a body shop should stay well under about 120 microns. This is why cheap resprayed bumpers often come back with dead sensors.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 14px; border-bottom: 1px solid #eee; padding-bottom: 14px;\"\u003e\n\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eDoes it need coding?\u003c\/summary\u003e\n\u003cp style=\"margin: 12px 0 0 20px; color: #444;\"\u003eUsually not. Most cars accept the sensor and clear on their own after a few ignition cycles. Some later cars with Active Parking Assist hold the stored fault until it is reset with a scanner — a few minutes at any independent shop.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 14px; border-bottom: 1px solid #eee; padding-bottom: 14px;\"\u003e\n\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eWhy does one bad sensor kill the whole system?\u003c\/summary\u003e\n\u003cp style=\"margin: 12px 0 0 20px; color: #444;\"\u003eThe sensors run on a shared bus and the module self-tests all of them on start-up. One that fails to answer makes the module flag the whole array rather than guess at partial coverage — which is why a single dead sensor gives you a red display and no parking aid at all.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 26px; border-bottom: 1px solid #eee; padding-bottom: 14px;\"\u003e\n\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eCan I return them?\u003c\/summary\u003e\n\u003cp style=\"margin: 12px 0 0 20px; color: #444;\"\u003e30 days on unused, uninstalled sensors in original packaging. Painted or installed sensors cannot be returned — confirm your part number first.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003ch2 style=\"margin: 30px 0 12px;\"\u003eBuy With Confidence\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFree shipping\u003c\/strong\u003e from California, same or next business day\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1-year limited warranty\u003c\/strong\u003e on every sensor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e30-day returns\u003c\/strong\u003e on unused, uninstalled items\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment confirmed before you buy\u003c\/strong\u003e — send your VIN or part number\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMercedes specialists\u003c\/strong\u003e — this is all we do\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp style=\"text-align: center; font-size: 15px; margin-top: 26px;\"\u003e\u003ca href=\"mailto:benzunitedparts@gmail.com?subject=PDC%20Sensor%20Fitment%20Check\" style=\"color: #b30000; font-weight: 600;\"\u003eNot sure which pack or which number? Send us your VIN →\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BenzUnited Parts","offers":[{"title":"Single","offer_id":47070920376495,"sku":"BU-PDC-55504-1","price":14.99,"currency_code":"USD","in_stock":true},{"title":"4-Pack","offer_id":47282698911919,"sku":"BU-PDC-55504-4","price":29.95,"currency_code":"USD","in_stock":true},{"title":"6-Pack","offer_id":47282698944687,"sku":"BU-PDC-55504-6","price":39.95,"currency_code":"USD","in_stock":true},{"title":"12-Pack","offer_id":47282698977455,"sku":"BU-PDC-55504-12","price":65.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0631\/8718\/9935\/files\/a0009055504-pdc-parking-sensor.webp?v=1781687846"}],"url":"https:\/\/benzunitedparts.com\/collections\/mercedes-parking-sensors-parktronic.oembed","provider":"BenzUnited Parts","version":"1.0","type":"link"}