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Your Vehicle 2004 Mercedes Benz E320 Base Sedan 211.065 V6 3.2L

Power Stop Z23 Evolution Sport Rear Brake Kit

A premium rear-axle performance upgrade package featuring precision cross-drilled & slotted zinc-plated performance rotors, low-dust carbon-fiber ceramic road pads, and an included replacement electronic wear sensor.
Power Stop
Mfg Part #
K6566 K6566
ECS Part #
ES#3990148
Brand
Power Stop

231.99
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on orders $49 and up
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Product Details

Rein in the power of your premium high-performance European luxury cruiser or grand touring roadster while completely eliminating aggressive, messy factory brake dust. The Power Stop Z23 Evolution Sport Brake Kit serves as an upgraded rear-axle only performance replacement package (serving as the street-performance cross-drilled and slotted equivalent to the smooth CRK6566 series). It is engineered as a direct bolt-on upgrade to manage high-speed deceleration and maintain vehicle balance without introducing the harsh pedal fade common to standard replacement configurations.

By swapping out plain, heat-retaining factory discs for Tru-Cast performance iron, this kit maximizes thermal resilience on the rear axle. Precision-machined cooling holes accelerate external airflow across the solid discs to drop operational hot-spots fast under sudden deceleration. Simultaneously, rounded outer slots continuously sweep away boundary gases, moisture, and micro-debris to ensure a clean, un-glazed pad contact patch. Every performance rotor is finished with a defensive silver zinc-dichromate plating to actively prevent rust, scaling, and oxidation along the un-swept hub faces, lug ports, and outer edge profiles.

The rotors are paired with advanced Z23 carbon-fiber infused ceramic pads. This compound noticeably increases braking torque compared to traditional standard ceramic pads, providing a confident, immediate initial pedal bite without the harsh squeal or heavy black carbon residue common to original European factory semi-metallic configurations, keeping your rear wheels looking pristine.

Key Features:

  • Z23 Evolution Sport Pads: Formulated with a proprietary low-dust carbon-fiber ceramic compound designed to noticeably increase braking torque while keeping performance alloy wheels clear of dark, corrosive factory dust. Features multi-layer rubberized shims for virtually noise-free operation.

  • Solid Rear Performance Rotors: Precision cross-drilled holes accelerate structural cooling to minimize hot spots or fade under high thermal loads, while sweeping slots maintain a clean pad face. Fully zinc-plated to ensure long-lasting defense against moisture and winter road elements.

  • Rear Axle Solution with Sensor: A complete rear brake maintenance solution containing upgraded Z23 pads, premium stainless steel installation hardware clips, corresponding cross-drilled and slotted zinc-plated solid rear rotors, and an enclosed replacement electronic brake pad wear indicator sensor wire.

Kit Contents

  • Rear Z23 Evolution Sport Carbon-Fiber Ceramic Brake Pads

  • (1) Rear OEM-Grade Electronic Brake Pad Wear Sensor Wire

  • (2) Rear 300mm Drilled & Slotted Zinc-Plated Solid Performance Rotors

  • Rear Premium Stainless Steel Hardware Pack / Abutment Clips

  • High-Temperature Ceramic Brake Lubricant

This Part Fits the Following Vehicles

Make Model Submodel Engine Year Chasis Special Fitment Notes
Mercedes Benz CL550 Base V8 5.5L 273.961 2007 216.371 Use vehicle selector to confirm fitment
Mercedes Benz CL550 Base V8 5.5L 273.961 2008 216.371 Use vehicle selector to confirm fitment
Mercedes Benz S400 Hybrid V6 3.5L 272.974 2011 221.195 Without Sport Package
Mercedes Benz S400 Hybrid V6 3.5L 272.974 2012 221.195 Without Sport Package
Mercedes Benz S400 Hybrid V6 3.5L 272.974 2013 221.195 Without Sport Package
Mercedes Benz S550 Base V8 5.5L 273.961 2007 221.171 Use vehicle selector to confirm fitment
Mercedes Benz S550 Base V8 5.5L 273.961 2008 221.171 Use vehicle selector to confirm fitment
Mercedes Benz S550 Base V8 5.5L 273.961 2009 221.171 Use vehicle selector to confirm fitment
Mercedes Benz S550 Base V8 5.5L 273.961 2010 221.171 Use vehicle selector to confirm fitment
Mercedes Benz S550 Base V8 5.5L 273.961 2011 221.171 Use vehicle selector to confirm fitment
Mercedes Benz SL550 Base V8 5.5L 273.965 2007 230.471 Use vehicle selector to confirm fitment
Mercedes Benz SL550 Base V8 5.5L 273.965 2008 230.471 Use vehicle selector to confirm fitment
Mercedes Benz SL550 Base V8 5.5L 273.965 2009 230.471 Without Sport Package
Mercedes Benz SL550 Base V8 5.5L 273.965 2011 230.471 Without Sport Package
Mercedes Benz SL550 Base V8 5.5L 273.965 2012 230.471 Without Sport Package
*The above product applications have been written by ECS Tuning. All warranties, product application, fitment, and performance are the responsibility of ECS Tuning. For additional information see the terms of use.

This product is not eligible for Lifetime Replacement

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Return and Exchanges

Need to set up a return? Click here to begin: Return Process

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New/Unused Product Returns

ECS Tuning will accept returns for unused products within 90 days of the ship date for a refund to the original payment method used. The customer is responsible for the return shipping costs and fees. If selecting to use a prepaid shipping label, the shipping cost will be deducted from the total refunded amount. All new/unused products must be new, unused and must be in the original packaging, including labeling, manuals, hardware, etc. Special order parts are non-refundable.

In the event that we find an error on our website or on behalf of an ECS Tuning Representative, we will provide a return shipping label from the original delivery location.

Refused Packages

Any domestic orders that are returned to ECS Tuning as refused by receiver or non-deliverable will be subject to a return handling fee and will be processed as a return in compliance with our standard return policy, including a 15% restocking fee.

Any international orders that are refused at the time of delivery will be subject to carrier abandonment of the package, at which time the ordered products would be discarded by the carrier. The customer will not be refunded for the value of the order and the discarded products are no longer retrievable.

Return Process

Return Process

ECS Tuning now offers an online returns solution! To get started, simply log into your ECS Tuning account, Click the "View Orders" button on the My Account home page and select the order that you wish to make a return on to begin. If you have any questions, feel free to reach out to our Customer Service Team for assistance!

Please note: Refunds will be processed to the original payment method used on the order or to an in store credit, respective to the type of return that is made as well as any pre-existing arrangements with an ECS Tuning Customer Service Representative. In the event that multiple forms of payment were used, we will refund the value to an in store credit. In the event that a return label is provided, these charges may be deducted from the total refund you receive.

Original shipping costs are non-refundable and the buyer is responsible for return shipping charges. ECS Tuning will not accept COD deliveries.


All in store credit balances will expire after one year from the original purchase date.

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Shipping Policy

Free Shipping On Orders $49 & Up

Items marked with a 'Free Shipping On Orders $49 and Up' logo may qualify for free standard economy ground shipping to the contiguous United States (48 states) for most orders with a value greater or equal to $49.00 USD. Oversized products and direct ship products are excluded from this offer unless otherwise noted.

Free Shipping

Items marked as 'Free Shipping' may qualify for free standard economy ground shipping to the contiguous United States (48 states). Oversized products and direct ship products are excluded from this offer unless otherwise noted.


The policies listed above are subject to change at any time without notice.

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Lifetime Replacement

Want to know more about our Lifetime Replacement program?

Click here to learn more.

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Why You Should Shop From ECS Tuning

ECS Tuning stands out as more than an automotive parts supplier-it's a vibrant community fueled by a shared passion for cars. Born from the enthusiasm of car lovers, we offer an unmatched understanding and commitment to the automotive world, providing high-quality parts and accessories sourced from our own experiences. Our selection is meticulously crafted to meet the highest standards of performance, quality, and design, catering to both the latest trends and classic styles.


Our distinct advantage lies in our passionate team and comprehensive support, offering expert advice and seamless service from selection to installation. Shopping with ECS brings exclusive perks, including our Lifetime Replacement Guarantee and free shipping on orders over $49, enhancing the value of every purchase. As a central hub for car enthusiasts, ECS Tuning fosters a rich community where ideas and experiences flourish, transforming us from a mere supplier into a platform where automotive dreams come to life.

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Cancellation Policy

At ECS Tuning, we understand that plans can change. That's why we offer a flexible cancellation policy for our customers. You may cancel your order at any time before you receive the shipment confirmation. This policy is designed to provide you with peace of mind and the flexibility to make adjustments to your purchases as needed. Should you decide to cancel your order, simply reach out to our customer service team, and we will assist you with the process swiftly and efficiently.

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