2720506847 Benz OEM Engine Timing Gear  2720506847  Engine Timing System Parts

1. Product Positioning

    The 2720506847 is a genuine Mercedes-Benz timing system component, specifically designed for the M276/M278 engine platform. It ensures precise synchronization between the crankshaft and dual overhead camshafts (DOHC).

2. Technical Specifications

• Material & Manufacturing:

  • Base material: SAE 8620 carburized steel

  • Surface treatment: Laser hardening (HRC 58-62 hardness)

  • Tooth grinding precision: DIN Class 6 accuracy

• Dynamic Performance:

  • Max. operating speed: 7,200 RPM

  • Noise level: ≤72 dB (@3,000 RPM)

  • Axial runout: <0.05mm

3. Compatibility

Special Notes:

• Not compatible with 48V mild hybrid versions

• AMG models require reinforced bolts (sold separately)

4. Installation Guidelines

1. Pre-Installation Checks:

   • Measure sprocket axial clearance (standard: 0.1-0.3mm)

   • Clean oil passages and pre-lubricate bearing surfaces

2. Torque Specifications:

   • Center bolt: 80Nm + 90° angle torque

   • Requires MB special tool (TORX E14)

3. Timing Calibration:

   • VVT relearn via XENTRY diagnostic system

   • Cold valve clearance adjustment (intake: 0.20±0.02mm)

5. Recommended Replacement Parts

For optimal performance, replace together with:

• Hydraulic tensioner (A2760501447)

• Guide rail assembly (A2760502047)

• Seal kit (Q2760500047)