Elring 398.420 Differential Seal

Elring Differential Seal for Mercedes-Benz Axles

Elring 398.420 is a differential seal built with FPM (fluoride rubber) and ACM (polyacrylate rubber) for axle sealing applications that demand stable resistance to heat and fluid exposure. With a 40.0 mm inside diameter, 70.0 mm outside diameter, and 13 mm height, this seal is specified for select Mercedes-Benz G55 AMG and G500 applications.

Key Features

• Part number: 398.420
• Material: FPM (fluoride rubber) / ACM (polyacrylate rubber)
• Inside diameter: 40.0 mm
• Outside diameter: 70.0 mm
• Height: 13 mm
• Height 2: 20 mm
• Radial shaft seal design: SP
• Swirl type: WD

Fitment Details

• Fits 2006-2011 Mercedes-Benz G55 AMG, N/A. Notes: Width 13 mm; inner diameter 40 mm; outer diameter 70 mm; swirl type alternating twist.
• Fits 2003-2004 Mercedes-Benz G55 AMG, N/A. Notes: Width 13 mm; inner diameter 40 mm; outer diameter 70 mm; swirl type alternating twist.
• Fits 1999-2008 Mercedes-Benz G500, N/A. Notes: Width 13 mm; inner diameter 40 mm; outer diameter 70 mm; swirl type alternating twist.
• Fits 2005 Mercedes-Benz G55 AMG, Rear. Notes: Rear position application.

Detailed Description

This Elring differential seal is engineered for precise axle sealing where the seal dimensions and profile must match the housing and shaft requirements. The SP radial shaft seal design and alternating twist swirl type support controlled sealing performance in driveline and axle service. For Mercedes-Benz G55 AMG and Mercedes-Benz G500 models, part number 398.420 provides the dimensional match needed for the listed applications.

This part cross-references 017 997 55 47 and 018 997 17 47 for the same application.

Common Uses

• Replacing a leaking differential seal on a Mercedes-Benz G55 AMG
• Addressing gear oil seepage at the axle or differential housing
• Restoring proper sealing after seal wear, hardening, or shrinkage
• Correcting fluid loss that can lead to driveline contamination
• Servicing a Mercedes-Benz G500 differential with the specified seal dimensions

Installation Notes and Tips

Verify the seal dimensions, profile, and position before installation. Clean the sealing surface thoroughly, inspect the shaft for wear or scoring, and confirm the housing bore is free of damage. Match the application notes for width, inner diameter, outer diameter, and swirl type to avoid fitment issues on Mercedes-Benz G55 AMG and G500 driveline service.

Quality Assurance

Elring is a recognized sealing-system manufacturer with OE-focused engineering for driveline and engine sealing applications. Part number 398.420 is built to the listed dimensional and material specifications for the confirmed Mercedes-Benz fitments.