Zimmermann 400.3670.20 Disc Brake Rotor - Front

Brake Rotor Overview

The Zimmermann 400.3670.20 is a coated disc brake rotor built for heavy-duty front brake applications on select Mercedes-Benz SUVs and crossovers. It combines an internally vented design with high-carbon machining and OE-level dimensions for consistent braking performance.

Key Features

• Internally vented brake disc design for improved heat management.
• Coated surface helps resist corrosion and keeps the rotor looking cleaner.
• High-carbon machining supports stable braking under load.
• OE-specified dimensions for proper rotor fit and function.
• Fits front brake applications on select Mercedes-Benz GL350, GL450, GL320, and ML550 models.

Detailed Description

Zimmermann manufactures the 400.3670.20 to match the dimensions and material quality specified by vehicle manufacturers for standard replacement use. This rotor features a 375 mm outer diameter, 32 mm thickness, 29.4 mm minimum thickness, 54.5 mm height, 67 mm hub bore, and an 8/5 hole arrangement with a 112 mm bolt circle. The coated finish adds corrosion resistance, while the internally vented construction helps manage heat during repeated stops. This part number 400.3670.20 is a direct fit for front brake service on Mercedes-Benz GL350, GL450, GL320, and ML550 applications listed below.

Zimmermann’s Coat Z anti-corrosion coating line was introduced to improve surface protection and visual appearance on replacement brake rotors. For buyers looking for a Mercedes-Benz brake rotor that follows OE-style sizing and finish standards, the 400.3670.20 offers a practical replacement option. This part cross-references Brembo (e.g., 09.R105.11) and BBB Industries (e.g., 17833) for the same application.

What It Helps Address

• Brake pulsation caused by worn or out-of-spec rotors.
• Reduced stopping consistency from heat buildup.
• Corrosion on exposed rotor surfaces.
• Fitment issues from incorrect diameter, bore, or thickness.
• Noise or uneven braking linked to rotor wear.

Installation Notes

Verify rotor dimensions, hub bore, bolt pattern, and minimum thickness before installation. This rotor is listed for front position use only and includes a heavy-duty brake note on select GL350 and GL320 applications. Confirm vehicle-specific brake package details before ordering to ensure correct fitment.

Quality Assurance

Zimmermann standard rotors are produced as equivalent-quality replacement parts aligned with original-fit specifications under EU motor vehicle block exemption standards. The coated finish is part of Zimmermann’s anti-corrosion rotor program.