What does a belt drive tensioner assembly do?

The tensioner assembly keeps the serpentine belt at the correct tension. This ensures that all the accessories driven by the belt, such as the alternator and power steering pump, operate efficiently and without slipping.

When should I consider replacing my belt tensioner?

It's often recommended to replace the tensioner when you replace the serpentine belt, especially if the vehicle has high mileage. Signs of a failing tensioner include squealing noises from the belt area, or visible wobbling of the tensioner pulley.

Does this tensioner assembly come with a new belt?

This part is the tensioner assembly only and does not include a new serpentine belt. You will need to purchase the belt separately if it is also due for replacement.

Gates Belt Drive Tensioner Assembly 39194

Name: Gates 12-15 Mercedes-Benz S550 V-8 4.6L Tensioner Assy. Belt Drive Tensioner
Brand: Gates
Price: 160.06 USD
Availability: InStock

Gates 12-15 Mercedes-Benz S550 V-8 4.6L Tensioner Assy. Belt Drive Tensioner

$160.06

Only 8 left in stock

Gates belt drive tensioner assembly for 2012-2016 Mercedes-Benz S550 V-8 4.6L.

Key Features

Fits 2012-2016 Mercedes-Benz S550 V-8 4.6L.
Designed for a wide range of Mercedes-Benz V-8 models including CL550, CLS550, E550, G63 AMG, GL550, ML550, S63 AMG, SL550, and SLK55 AMG.
Maintains proper serpentine belt tension for accessory drive function.
Well-built with durable materials for reliable performance.
Helps prevent belt slippage and related accessory issues.

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Will this fit your vehicle?

Product Details

When you're dealing with a worn-out accessory belt system on your Mercedes-Benz, a failing tensioner can cause all sorts of problems. This Gates Belt Drive Tensioner Assembly is designed to keep your serpentine belt running at the correct tension, ensuring all your accessories like the alternator, power steering pump, and AC compressor work as they should. It's a crucial part for maintaining the smooth operation of your engine's accessory drive.

This tensioner assembly is a well-built replacement that fits a wide range of Mercedes-Benz V-8 4.6L and 5.5L models, including popular vehicles like the S550, CLS550, and E550. Gates uses durable materials and precise manufacturing to ensure this tensioner can handle the constant flexing and heat of the engine bay, providing reliable performance for years to come. Proper belt tension is key to preventing belt slippage, which can lead to reduced charging system output, loss of power steering assist, and a noisy belt.

Replacing a tensioner is often done when you're replacing the serpentine belt itself, as it's a common wear item. This assembly is designed to fit right into the factory location, making installation straightforward for a qualified technician.