Elring 188.680 Engine Crankshaft Seal - Rear

Mercedes-Benz Crankshaft Seal for Engine Sealing

Elring 188.680 is an engine crankshaft seal built with rubber and textile reinforcement for dependable sealing at the crankshaft. With a 78.0 mm inside diameter, 94.0 mm outside diameter, and 8.0 mm thickness, it matches the dimensional requirements listed for select Mercedes-Benz diesel applications.

Compatible with Mercedes-Benz 300D, 300SD, and 300TD applications, this Elring crankshaft seal is specified for rear and transmission-end positions where precise sealing is critical. The GRP radial shaft seal design supports consistent contact at the shaft interface for OE-style engine sealing service.

• Brand: Elring
• Part number: 188.680
• Engine crankshaft seal for sealing system service
• Rubber with textile reinforcement for durability and shape retention
• Inside diameter: 78.0 mm
• Outside diameter: 94.0 mm
• Thickness: 8.0 mm
• Radial shaft seal design: GRP
• Fits Mercedes-Benz 300D, 300SD, and 300TD applications listed below

Detailed Fitment and Application

This seal is used in Mercedes-Benz diesel engine sealing applications where crankshaft leakage control is required. It cross-references Victor Reinz 71-19722-00 for the same application. If you are sourcing an Elring 188.680 crankshaft seal for a Mercedes-Benz 300D rear seal or a Mercedes-Benz 300TD transmission-end seal, verify the listed dimensions and position before installation.

• Fits 1983-1985 Mercedes-Benz 300D, N/A, Thickness: 8mm; Inner Diameter: 78mm; Outer Diameter: 94mm
• Fits 1977-1981 Mercedes-Benz 300D, N/A, Thickness: 8mm; Inner Diameter: 78mm; Outer Diameter: 94mm
• Fits 1983-1985 Mercedes-Benz 300SD, N/A, Thickness: 8mm; Inner Diameter: 78mm; Outer Diameter: 94mm
• Fits 1979-1985 Mercedes-Benz 300TD, N/A, Thickness: 8mm; Inner Diameter: 78mm; Outer Diameter: 94mm
• Fits 1982 Mercedes-Benz 300D, N/A, Thickness: 8mm; Inner Diameter: 78mm; Outer Diameter: 94mm; Transmission End
• Fits 1976 Mercedes-Benz 300D, N/A, Thickness: 8mm; Inner Diameter: 78mm; Outer Diameter: 94mm; Transmission End
• Fits 1978-1982 Mercedes-Benz 300SD, Rear, Thickness: 8mm; Inner Diameter: 78mm; Outer Diameter: 94mm; Transmission End
• Fits 1975 Mercedes-Benz 300D, Rear, Thickness: 8mm; Inner Diameter: 78mm; Outer Diameter: 94mm; Transmission End

What This Seal Helps Address

• Crankshaft oil leakage at the rear or transmission-end seal area
• Oil seepage that can contaminate the bellhousing or surrounding engine components
• Seal wear caused by age, heat, and shaft movement
• Loss of sealing integrity during engine reseal service
• Fitment issues when replacing a worn Mercedes-Benz 300D, 300SD, or 300TD crankshaft seal

Installation Notes and Tips

Confirm the seal dimensions, shaft diameter, and installation position before assembly. Clean the sealing surface thoroughly, inspect the crankshaft for wear or scoring, and install the seal squarely to avoid distortion. For Mercedes-Benz 300D, 300SD, and 300TD service, match the rear or transmission-end application exactly to the vehicle listing.

Quality Assurance

Elring is a recognized name in engine sealing systems, and this part number 188.680 is built to the dimensional and material specifications shown above for accurate replacement service.