Dayco Automatic Belt Tensioner Mercedes C200 CDI C220 C250 C250D CLS250 E200

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 > C200 CDI > Jun 2011 - , 2.1L, 4 cyl, 16V, DOHC, CRD Turbo, Diesel, W204, 100kW, EngCode: OM651.913

Mercedes Benz > C220 CDI > Mar 2010 - May 2011, 2.1L, 4 cyl, 16V, DOHC, CRD Turbo, Diesel, W204, 125kW, EngCode: OM651.911

Mercedes Benz > C250 > Aug 2014 - , 2.1L, 4 cyl, 16V, DOHC, CRD, Twin Turbo, W205 S205, 150kW, EngCode: OM651.921

Mercedes Benz > C250 CDI > Jul 2011 - , 2.1L, 4 cyl, 16V, DOHC, CRD Turbo, Diesel, W204, 150kW, EngCode: OM651.911

Mercedes Benz > C250D > Nov 2015 - , 2.1L, 4 cyl, 16V, DOHC, CRD, Twin Turbo, Diesel, W205, 150kW, EngCode: OM651.921

Mercedes Benz > CLS250 CDI > Sep 2012 - Jul 2015, 2.1L, 4 cyl, 16V, DOHC, CRD, Turbo, Diesel, C218, 150kW, EngCode: OM651.924

Mercedes Benz > CLS250 CDI > Dec 2012 - Jul 2015, 2.1L, 4 cyl, 16V, DOHC, CRD, Turbo, Diesel, W218, 150kW, EngCode: OM651.924

Mercedes Benz > CLS250 CDI > Dec 2012 - Jul 2015, 2.1L, 4 cyl, 16V, DOHC, CRD, Turbo, Diesel, X218, 150kW, EngCode: OM651.924

Mercedes Benz > CLS250 CDI > Aug 2015 - , 2.1L, 4 cyl, 16V, DOHC, CRD, Turbo, Diesel, C218, 150kW, EngCode: OM651.924

Mercedes Benz > CLS250 CDI > Aug 2015 - , 2.1L, 4 cyl, 16V, DOHC, CRD, Turbo, Diesel, W218, 150kW, EngCode: OM651.924

Mercedes Benz > E200 > Jun 2013 - , 2.0L, 4 cyl, 16V, DOHC, MPFI, A/C 207 / W212, 135kW, EngCode: M274.920

Mercedes Benz > E200 > Jul 2016 - , 2.0L, 4 cyl, 16V, DOHC VVT, MPFI, W213, 135kW, EngCode: M274.920

Mercedes Benz > E220 CDI > Oct 2009 - , 2.1L, 4 cyl, 16V, DOHC, Turbo, Diesel, W212, 125kW, EngCode: OM651.924

Mercedes Benz > E220 CDI > 2011 - 2012, 2.1L, 4 cyl, 16V, DOHC, CRD, Turbo, Diesel, S212, 125kW, EngCode: OM651.924

Mercedes Benz > E220 CDI > 2011 - 2012, 2.1L, 4 cyl, 16V, DOHC, CRD Turbo, Diesel, A207, 125kW, EngCode: OM651.911

Mercedes Benz > E220 CDI > 2011 - 2012, 2.1L, 4 cyl, 16V, DOHC, CRD Turbo, Diesel, C207, 125kW, EngCode: OM651.911

Mercedes Benz > E250 > Jun 2013 - , 2.0L, 4 cyl, 16V, DOHC, TFSI, Turbo, C/A207 W212, 155kW, EngCode: M274.920

Mercedes Benz > E250 CDI > Oct 2009 - Jan 2016, 2.1L, 4 cyl, 16V, DOHC, CRD, Turbo, Diesel, S212, 150kW, EngCode: OM651.924

Mercedes Benz > E250 CDI > Oct 2009 - Apr 2016, 2.1L, 4 cyl, 16V, DOHC, CRD, Turbo, Diesel, C207, 150kW, EngCode: OM651.911

Mercedes Benz > E250 CDI > Oct 2009 - , 2.1L, 4 cyl, 16V, DOHC, CRD, Turbo, Diesel, W212, 150kW, EngCode: OM651.924

Mercedes Benz > E250 CDI > Jun 2010 - May 2013, 2.1L, 4 cyl, 16V, DOHC, CRD, Turbo, Diesel, A207, 150kW, EngCode: OM651.911

Mercedes Benz > E250D > Apr 2016 - , 2.1L, 4 cyl, 16V, DOHC, CRD, Turbo, Diesel, C207, 150kW, EngCode: OM651.911

Mercedes Benz > E300 > May 2013 - , 2.1L, 4 cyl, 16V, DOHC, CRD, Turbo, W212 Bluetec Hybrid, 150kW, EngCode: OM651.924

Mercedes Benz > GLC220D > Nov 2015 - Apr 2018, 2.2L, 4 cyl, 16V, DOHC, CRD, Turbo, Diesel, X253, 125kW, EngCode: OM651.921

Mercedes Benz > GLC220D > Sep 2016 - Apr 2018, 2.2L, 4 cyl, 16V, DOHC, CRD, Turbo, Diesel, C253, 125kW, EngCode: OM651.921

Mercedes Benz > GLC250D > Nov 2015 - , 2.1L, 4 cyl, 16V, DOHC, CRD, Turbo, Diesel, X253, 150kW, EngCode: OM651.921

Mercedes Benz > GLE250d > Oct 2015 - May 2019, 2.1L, 4 cyl, 16V, DOHC, CRD, Turbo, Diesel, W166, 150kW, EngCode: OM651.960

Mercedes Benz > ML250CDI > Apr 2012 - , 2.2L, 4 cyl, 16V, DOHC, DTFI, Turbo, 150kW, EngCode: OM651.960

Mercedes Benz > SLK250 > Feb 2012 - , 2.1L, 4 cyl, 16V, DOHC, CRD, Turbo, Diesel, R172, EngCode: OM651.980