Part number: MER-0031534928 is a new, unused Genuine Mercedes engine crankshaft position sensor. The engine crank shaft position sensor tells the car's computer the position of the crankshaft in its rotation for the purposes of things like firing spark and adjusting valve timing (if applicable). An indication of a faulty sensor might include failure to start or poor performance.You can trust Genuine Mercedes parts to offer you the same safety and security that was originally engineered into your vehicle when it was rolled off the production line. Genuine Mercedes parts are designed and manufactured by the finest suppliers across the globe.FCP Euro features an extensive online catalog of genuine, OEM and aftermarket replacement parts from a wide variety of quality manufacturers. With an online catalog of over 500,000 replacement parts for Volvo, BMW, Audi, Saab, VW and Mercedes makes, it’s no wonder that more automotive enthusiasts are turning to us when it comes to finding the right parts and an affordable price.If you are not 100% satisfied with your purchase, you can return your order FCP Euro for a full refund. With FCP Euro’s 365 day hassle free return policy, there are no special catches or exceptions.