Mercedes-Benz Genuine O-Ring Seal A0199971345

Maintain perfect fluid sealing in your Mercedes-Benz with the factory O-ring seal (part A0199971345). Molded to exact OEM specs, this ring delivers reliable, long-lasting resistance against oil, coolant and hydraulic fluids under a wide temperature range.

Key Benefits

• Exact OEM Fit – machined to Mercedes-Benz CAD data for perfect groove seating and uniform clamp pressure.

• Premium Nitrile Rubber – material choice offers outstanding chemical resistance to engine oil, transmission fluid, coolant and brake fluid.

• Wide Temperature Range – maintains elasticity from –40 °C to +150 °C, preventing hardening or swelling.

• Durable & Leak-Proof – resists compression set and extrusion under system pressures up to 20 bar, ensuring zero leaks.

• Direct Replacement – fits seamlessly into the original housing or flange; no shims, sealants or modifications required.

Vehicle Compatibility

Fits a variety of Mercedes-Benz models wherever part number A0199971345 is specified, including but not limited to:

• C-Class (W204/W205) engine covers and oil filler housings

• E-Class (W212/W213) transmission and differential drain plugs

• GLC/X-Class brake-line fittings and power-steering assemblies

Always verify the part code A0199971345 on your original seal or via VIN lookup before ordering.

Technical Specifications

• Part Number: A0199971345

• Material: Nitrile (NBR) rubber

• Inner Diameter: 12.0 mm

• Cross-Section: 2.5 mm

• Fluid Compatibility: Engine oil, ATF, coolant, brake fluid (DOT 4)

• Temperature Range: –40 °C … +150 °C

• Pressure Rating: Up to 20 bar

• Warranty: 24 months genuine-parts coverage

Installation Overview

1. Drain the relevant system fluid below the seal level.

2. Remove the old O-ring and clean the groove, removing all debris and residue.

3. Inspect the housing surface for nicks or corrosion; repair if needed.

4. Lubricate the new O-ring lightly with clean system fluid.

5. Seat the O-ring evenly in the groove, ensuring it is not twisted.

6. Reassemble components and torque fasteners to the manufacturer’s specification.

7. Refill fluid, run the system, and check for leaks after warm-up.