This pulley is manufactured by Litens Automotive the inventor of the first automatic belt tensioner in 1979 and today the world's largest supplier of Original Equipment (O.E.) belt tensioning and routing products. This pulley is produced in our same German facility that produced the O.E. part. This pulley conforms to original equipment material, tolerances, and specifications. The part is made in Germany using the O.E. specified design and meets all performance and durability requirements. Heavy duty thermoplastic construction for long life and trouble-free performance. Supplied with new dust shield, washer, and bolt. The pulley was designed by Litens for 2012-2015 Mercedes-Benz vehicles with 4-Cyl.1.4L engines. Litens is the world's largest supplier of original equipment (O.E.) power transmission products. At Litens, we design systems that are more efficient, resulting in tangible fuel economy/emissions benefits. Litens holds over 2000 patents and continues to respond to the ever-changing automotive industry by investing heavily in new technology, facilities, and people. 90% of our line is made of products coming from the OE manufacturer, which makes the Litens Tensioning Products portfolio the purest OE tensioning line in the North American aftermarket.