Centric 320.35138H Disc Brake Rotor - Front

Centric GCX Front Brake Rotor Overview

The Centric GCX Elemental Protection Disc Brake Rotor is built for front brake service on select Mercedes-Benz SUVs and crossovers. Part number 320.35138H combines a fully coated finish with high-carbon rotor metallurgy to match OE-style performance while helping resist rust on exposed surfaces.

For drivers searching for a front brake rotor for Mercedes-Benz GLS450, ML350, ML400, or GL450 applications, this Centric rotor is engineered for direct-fit replacement and consistent braking feel. The fully coated disc finish and coated hat help maintain a cleaner appearance over time.

Key Features

• Centric GCX Elemental Protection Disc Brake Rotor, part number 320.35138H
• Fully coated disc finish with coated hat for added corrosion resistance on non-mating surfaces
• High-carbon metallurgy matched to OEM-style rotor requirements
• Vented rotor design with smooth surface type
• Application-specific coating pattern designed to work with pad friction characteristics
• Front axle fitment for select Mercedes-Benz models
• Outside diameter: 350 mm; nominal thickness: 32.0 mm
• Center hole diameter: 67.0 mm; 5-lug bolt pattern

Product Line Details

Centric GCX rotors are part of the brand’s Elemental Protection line, which focuses on coated braking surfaces and vehicle-specific metallurgy. The GCX FC and GCX families use coating patterns tailored to pad friction type, while the rotor alloy selection is matched to the OEM metallurgical profile for the application.

Detailed Description

This Centric GCX rotor is designed for front brake replacement on 2012-2015 Mercedes-Benz ML350, 2015 Mercedes-Benz ML400, 2013-2016 Mercedes-Benz GL350, 2014 Mercedes-Benz GL450, and 2017-2019 Mercedes-Benz GLS450. It uses a vented pillar-vane construction, floating disc mounting, and a smooth braking surface to support stable heat management and consistent pedal response in everyday driving.

Part number 320.35138H is a strong match for owners looking for a front brake rotor for Mercedes-Benz ML350 350mm front disc applications, a front rotor for Mercedes-Benz GL350 without the AMG Performance Package, or a front rotor for Mercedes-Benz GLS450 without the Exterior Sport Package. The coated finish helps protect the rotor’s exposed surfaces from rust and corrosion while preserving a cleaner look behind the wheel.

What This Rotor Helps Address

• Front brake pulsation caused by worn or uneven rotors
• Rust buildup on exposed rotor surfaces
• Reduced braking consistency from heat-stressed OE rotors
• Noise or vibration related to rotor wear
• Brake service needs on select Mercedes-Benz GLS450, ML350, ML400, GL350, and GL450 front applications

Installation Notes and Fitment

Fits 2017-2019 Mercedes-Benz GLS450, front; except Exterior Sport Package. Fits 2013-2016 Mercedes-Benz GL350, front; except AMG Performance Package. Fits 2012-2015 Mercedes-Benz ML350, front; 350mm front disc, except AMG and Armor. Fits 2015 Mercedes-Benz ML400, front; 350mm front disc, except AMG and Armor. Fits 2014 Mercedes-Benz GL450, front; except AMG Performance Package.

Before installation, confirm rotor diameter, center hole, bolt circle, and thickness against the existing brake setup. This rotor is a floating-mount, vented front disc brake rotor and should be paired with the correct pad type for the vehicle’s brake system.

Quality Assurance

Centric designs GCX rotors to align with OE performance targets and uses corrosion-resistant coating on non-mating surfaces for extended service life and appearance retention. The brand’s application-specific metallurgy and coating strategy are intended to deliver consistent fitment across a broad vehicle coverage range, including Mercedes-Benz ML350, GL350, and GLS450 front brake applications.