Upgraded Water Pump Pulley for Mercedes Benz E-Class CLS-Class CL-Class S-Class SL-Class G-Class E55 CLS55 CL55 S55 SL55 G55 (2003-2011) 5.5L

High-Clearance Billet Water Pump Pulley for 2003-2011 Mercedes Benz AMG 55 Series (W211, C219, C215, W220, R230, W463)

What it Does: The Upgraded Water Pump Pulley replaces the factory stamped unit on supercharged 5.5L AMG platforms to provide critical belt and clearance margins when running oversized aftermarket crank pulleys without reducing coolant flow.

The Stock Mercedes Benz 55 AMG Pulley Clearance Constraint

When upgrading boost levels on the supercharged M113K engine, installing a larger diameter crank pulley (such as 168mm to 195mm units) creates severe clearance interference with the factory water pump pulley flange. The OEM stamped-steel or composite pulley features a wide outer lip that makes physical contact with upgraded harmonic balancers and supercharger drive belts. Furthermore, standard aftermarket underdrive pulleys compromise low-speed coolant velocity, driving up engine coolant temperatures and exacerbating supercharger heat soak during aggressive driving or dyno pulls.

The Engineering Solution

Precision CNC-machined in the USA from aerospace-grade 6061-T6 billet aluminum, this replacement pulley features a specialized stepped snout and reduced outer flange profile. This geometry provides essential radial clearance for large-diameter crank pulleys while preserving the exact OEM running diameter and rotational speed of the factory cooling system. Finished in a mil-spec hard-anodized protective coating, it resists belt abrasion, thermal fatigue, and chemical degradation while reducing rotational mass on the accessory drive.

What's Included

• 1 x billet water pump pulley

Technical Specifications

Compatibility

• 2003-2008 Mercedes Benz E-Class E55 AMG 5.5L
• 2003-2008 Mercedes Benz CLS-Class CLS55 AMG 5.5L
• 2003-2008 Mercedes Benz CL-Class CL55 AMG 5.5L
• 2003-2008 Mercedes Benz S-Class S55 AMG 5.5L
• 2003-2008 Mercedes Benz SL-Class SL55 AMG 5.5L
• 2005-2011 Mercedes Benz G-Class G55 AMG 5.5L

Frequently Asked Questions & Fitment Warnings

Does this fit the W211, C219, C215, W220, R230, and W463 E-Class, CLS-Class, CL-Class, S-Class, SL-Class, and G-Class?

Yes, this is a direct fit for the 2003-2011 Mercedes Benz AMG models equipped with the supercharged M113K 5.5L V8 engine. This component does not fit naturally aspirated 5.5L M113 engines or later M156 6.2L V8 platforms.

Will this pulley alter factory coolant circulation rates or require ECU tuning?

No, the effective drive diameter retains standard OE water pump speed to prevent high-rpm cavitation or low-rpm cooling loss, and direct replacement requires no engine calibration.

The Mercedes Benz Precision Standard

Engineered for high-output European supercharged powertrains, this CNC billet component maintains factory thermal management while providing zero check engine lights and reliable clearances under heavy boost conditions.