Mercedes Belt Tensioner - Genuine Mercedes 2742003000

Product Information

Drive belt tensioners vary from vehicle to vehicle. In older vehicles the tensioner system for the accessory belts was manual in which the tension needed to be set each time the belt was installed. However in modern applications the tensioner assembly is automatic with the most common tensioner styles being either mechanical (spring loaded) or hydraulic (uses a hydraulic damper).

Belt tensioners maintain tension on the accessory belts ensuring that components like alternators, water pumps, A/C compressors, and power steering pumps are being powered by the engine while its running. Over time tensioners can wear resulting in their required replacement. Tensioner assemblies with integrated pulleys should be replaced at the same the belt is replaced as they wear together.

• Squealing from the drive belt
• Grinding or squeaking from the tensioner
• Odd wear pattern on belt
• Tensioner pulley bearing is loud
• Tensioner arm misalignment
• Tensioner assembly misalignment

About Genuine Mercedes

The original parts used by Mercedes Benz to build your car are available as replacement parts under the “Genuine Mercedes Benz” brand. Manufactured under the direction of Mercedes Benz, expect excellent quality and a premium price since these parts are exclusively available through the Mercedes Benz Dealership network.

You may not realize this, but the parts that make up your Mercedes-Benz are not necessarily manufactured by Mercedes-Benz. No cause for concern, as Mercedes-Benz designs the part, hires a manufacturer, and ensures its quality to you. In fact, many of these manufacturers have been making parts for Mercedes-Benz for decades. In our industry these manufacturers are called OEM (Original Equipment Manufacturers), and these are often brands you recognize, including Lemforder, ZF, Sachs, Bosch, Valeo, Zimmermann, Siemens VDO, Corteco, and more. Don’t be surprised to open that Genuine Mercedes-Benz parts box and find an OEM branded part inside, simply with the addition of a Mercedes-Benz logo.

Be sure to keep an eye out for OE tags on our product pages to quickly identify parts coming direct from OE manufacturers. That extra bit of insight could save you some serious money while shopping! Refer to our OE Academy for further information regarding the OE/OEM tags throughout the site.