Dayco Automatic Belt Tensioner Mercedes C180 C200 C250 CLC200 CLK200 E200 E250

Dayco No Slack Automatic Belt Tensioner

Designed to maintain constant tension on serpentine belt drives
Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories.

To maintain the proper tension throughout the drive, an automatic, spring-loaded tensioner is incorporated into the drive system geometry.

Dayco’s Automatic Belt Tensioner features a patented “flat spring” design that’s engineered to provide less operating range variations in tension.

This reduces the risk of premature accessory bearing failure due to high tension when a new belt is installed.

It also lessens the risk of belt squeal and slippage, or poor accessory performance caused by low tension after the belt begins to stretch and wear. A Teflon strip wound within the spring resists abrasion.

The flat spring itself is coated to resist rust.

Other superior design features include a steel locator pin (where the application demands).

A heavy-duty cast aluminium spring case resists cracking and fatigue. The heavy-duty cast aluminium arm offers additional strength and less distortion.

An aluminium retainer ring locks the spring case and arm together, and seals against corrosion.

A steel pivot tube (where the application demands) provides additional strength for critical torque requirements.

A thermoplastic rubber “spring slot plug” keeps out harmful contaminants. The lubricated nylon “pivot tube bushing” and “spring bushing” promote quieter performance.

A rubber “O” ring seals against dust and grime.

The zinc coated mounting bolt resists rust, and is concentric for a more even degree of constant tension.

In order to meet OEM performance standards, Dayco Automatic Tensioners come with either a glass-filled polymer (plastic) or steel pulley, that features a dust cover to protect against contaminants.

Fits the following Make, Model, Series:

Mercedes Benz > C180 > Jan 2007 - Jan 2014, 1.8L, 4 cyl, 16V, DOHC VVT, TFSI, W204, 115kW, EngCode: M271.952

Mercedes Benz > C180 > Jul 2011 - Jan 2013, 1.8L, 4 cyl, 16V, DOHC VVT, Direct Inj, Turbo, W204, 115kW, EngCode: M271.820

Mercedes Benz > C180 > Jul 2011 - Jan 2013, 1.8L, 4 cyl, 16V, DOHC VVT, Direct Inj, Turbo, C204, 115kW, EngCode: M271.820

Mercedes Benz > C180 > Jul 2011 - Jan 2013, 1.8L, 4 cyl, 16V, DOHC VVT, Direct Inj, Turbo, S204, 115kW, EngCode: M271.820

Mercedes Benz > C200 > Mar 2010 - Jul 2014, 1.8L, 4 cyl, 16V, DOHC VVT, Direct Inj, Turbo, W204, 135kW, EngCode: M271.860

Mercedes Benz > C200 > Mar 2010 - Aug 2014, 1.8L, 4 cyl, 16V, DOHC VVT, Direct Inj, Turbo, S204, 135kW, EngCode: M271.860

Mercedes Benz > C200 > Aug 2014 - , 1.8L, 4 cyl, 16V, DOHC VVT, TFSI, Turbo, W205 S205, 135kW, EngCode: M271.950

Mercedes Benz > C250 > Jan 2010 - Jul 2014, 1.8L, 4 cyl, 16V, DOHC VVT, Direct Inj, Turbo, W204, 150kW, EngCode: M271.860

Mercedes Benz > C250 > Jan 2010 - Jul 2014, 1.8L, 4 cyl, 16V, DOHC VVT, Direct Inj, Turbo, S204, 150kW, EngCode: M271.860

Mercedes Benz > C250 > Jul 2011 - Dec 2016, 1.8L, 4 cyl, 16V, DOHC VVT, Direct Inj, Turbo, S204, 150kW, EngCode: M271.860

Mercedes Benz > CLC200 > Aug 2008 - , 1.8L, 4 cyl, 16V, DOHC, SCMPFI, C203, 135kW, EngCode: M271.957, Supercharged

Mercedes Benz > CLK200 > Aug 2007 - Jun 2010, 1.8L, 4 cyl, 16V, DOHC VVT, MPFI, W209, 135kW, EngCode: M271.955, Supercharged

Mercedes Benz > E200 > Jun 2012 - May 2013, 1.8L, 4 cyl, 16V, DOHC VVT, Direct Inj, Turbo, W212, 135kW, EngCode: M271.860

Mercedes Benz > E250 > Oct 2009 - May 2013, 1.8L, 4 cyl, 16V, DOHC VVT, Direct Inj, Turbo, C207, 150kW, EngCode: M271.860

Mercedes Benz > E250 > Oct 2009 - May 2013, 1.8L, 4 cyl, 16V, DOHC VVT, Direct Inj, Turbo, W212, 150kW, EngCode: M271.860

Mercedes Benz > E250 > Oct 2009 - May 2013, 1.8L, 4 cyl, 16V, DOHC VVT, Direct Inj, Turbo, S212, 150kW, EngCode: M271.860

Mercedes Benz > E250 > May 2010 - May 2013, 1.8L, 4 cyl, 16V, DOHC VVT, Direct Inj, Turbo, A207, 150kW, EngCode: M271.860

Mercedes Benz > SLK200 > Jun 2008 - Jun 2011, 1.8L, 4 cyl, 16V, DOHC VVT, MPFI, 135kW, EngCode: M271.954, Supercharged

Mercedes Benz > SLK200 > Jul 2011 - Jul 2015, 1.8L, 4 cyl, 16V, DOHC VVT, Di, Turbo, R172, 135kW, EngCode: M271.861

Mercedes Benz > SLK250 > Feb 2012 - , 1.8L, 4 cyl, 16V, DOHC VVT, Direct Inj, Turbo, R172, 150kW, EngCode: M271.861