Zimmermann 400.3691.20 Disc Brake Rotor - Rear

Zimmermann Rear Brake Rotor for Mercedes-Benz

The Zimmermann 400.3691.20 is a coated solid disc brake rotor built to OE-style dimensions for rear axle applications. It is specified for select Mercedes-Benz compact models, including GLA250, CLA250, B250, and related variants, with a 295 mm outer diameter and 10 mm thickness.

• Solid rear disc brake rotor
• Coated surface for improved corrosion resistance and cleaner appearance
• Outer diameter: 295 mm
• Thickness: 10 mm; minimum thickness: 8.3 mm
• Height: 44 mm
• Hub bore: 67 mm
• Bolt circle: 112 mm
• 6/5 hole arrangement
• Weight: 4.5 kg

OE-Style Replacement Construction

Zimmermann 400.3691.20 is manufactured to dimensions and material quality specified by vehicle manufacturers, making it a direct replacement choice for rear brake service on Mercedes-Benz GLA250, CLA250, B250, GLA180, GLA200, CLA180, B250e, B Electric Drive, and A250 applications listed below. The coated finish helps resist surface corrosion and supports a cleaner rotor appearance after installation. This part cross-references Brembo 08.B348.41 and Gates 18300 for the same application.

Vehicle Fitment

• Fits 2020 Mercedes-Benz GLA250, rear, unvented; without Sport Package; B Class Electric Drive.
• Fits 2013-2019 Mercedes-Benz B250, rear.
• Fits 2014-2019 Mercedes-Benz CLA250, rear.
• Fits 2019 Mercedes-Benz CLA250, rear, AMG Sports Package [950] Sport Edition [P84] / Sport-Package USA [951] Sport Edition [P84].
• Fits 2014-2019 Mercedes-Benz GLA250, rear.
• Fits 2014-2018 Mercedes-Benz CLA250, rear, unvented.
• Fits 2016-2018 Mercedes-Benz GLA180, rear.
• Fits 2016-2017 Mercedes-Benz B250e, rear.
• Fits 2017 Mercedes-Benz CLA180, rear, Equipment Variant = - ECO; Product note: COAT Z.
• Fits 2014-2017 Mercedes-Benz GLA200, rear.
• Fits 2015-2016 Mercedes-Benz CLA180, rear.
• Fits 2014-2015 Mercedes-Benz B Electric Drive, rear.
• Fits 2013-2014 Mercedes-Benz A250, rear.

Common Service Uses

• Rear brake rotor replacement for worn or below-spec discs
• Correction of brake pulsation caused by rotor wear or thickness variation
• Replacement for corrosion-damaged rear rotors
• Service repair for Mercedes-Benz rear brake noise linked to rotor condition
• Restoration of proper rear braking surface on compatible Mercedes-Benz models

Installation Notes and Tips

Verify rotor diameter, hub bore, bolt pattern, and brake disc type before installation. This rotor is a solid, unvented rear disc, so it must be matched to vehicles listed with the same rear brake configuration. Always inspect pads, caliper condition, and hub mating surfaces during brake service, and measure rotor thickness against the minimum specification of 8.3 mm.

Quality Assurance

Zimmermann standard brake rotors are produced as equivalent-quality replacement parts aligned with OE specifications for the listed applications. The coated surface reflects Zimmermann’s Coat Z anti-corrosion approach for improved surface protection and appearance.