1. Product Overview
Image 1.1: Genuine Mercedes-Benz Drive Belt Idler Pulley (Part 000-202-17-19).
Image 1.2: Diagram of the drive belt system. The idler pulley (Part 000-202-17-19) is typically represented as item #5 in such diagrams, indicating its position within the belt path.
This manual provides essential information for the Mercedes-Benz Drive Belt Idler Pulley, part number 000-202-17-19. This genuine Mercedes-Benz component is designed for specific vehicle models, including the C250 and SLK250 with 1.8L engines. The pulley is a smooth type, crucial for the proper operation of the engine's drive belt system.
The idler pulley plays a vital role in guiding and maintaining tension on the serpentine belt, ensuring efficient power transfer to various engine accessories such as the alternator, power steering pump, and air conditioning compressor. Proper installation and maintenance are critical for vehicle performance and longevity.
2. Installation and Setup
Installation of the drive belt idler pulley requires mechanical aptitude and appropriate tools. It is recommended that this procedure be performed by a qualified technician. Always refer to the specific service manual for your Mercedes-Benz vehicle for detailed, model-specific instructions and torque specifications.
General Installation Steps:
- Safety First: Ensure the vehicle is turned off, the engine is cool, and the battery is disconnected before beginning any work. Use appropriate personal protective equipment.
- Access the Drive Belt System: Locate the drive belt and the existing idler pulley. This may require removing other components for access.
- Relieve Belt Tension: Use a serpentine belt tensioner tool to relieve tension on the drive belt. Carefully remove the belt from the pulleys.
- Remove Old Pulley: Unbolt and remove the old idler pulley. Note its orientation and position.
- Install New Pulley: Position the new Mercedes-Benz idler pulley (000-202-17-19) in the correct orientation. Secure it with the appropriate bolt, tightening to the manufacturer's specified torque.
- Reinstall Drive Belt: Route the drive belt correctly around all pulleys, including the new idler pulley. Use the tensioner tool to re-tension the belt. Double-check the belt routing against a diagram if available.
- Final Checks: Reconnect the battery. Start the engine and observe the drive belt for proper operation, ensuring no wobbling or unusual noises from the new pulley.
Note: The diagram (Image 1.2) illustrates the general layout of the drive belt system. The idler pulley is typically identified as item #5 in such schematics.
3. Function and Operation
The Mercedes-Benz Drive Belt Idler Pulley (000-202-17-19) is a non-driven component within the engine's accessory drive system. Its primary functions include:
- Belt Routing: It guides the serpentine belt along its correct path, ensuring proper alignment and preventing the belt from rubbing against other engine components.
- Tension Support: While not a tensioner itself, it works in conjunction with the belt tensioner to maintain optimal tension across the entire belt system, preventing slippage and ensuring efficient power transfer.
- Vibration Dampening: A properly functioning idler pulley helps to reduce vibrations and oscillations in the drive belt, contributing to smoother engine operation and reduced wear on other components.
The smooth surface of this specific pulley is designed for applications where the back (smooth) side of the serpentine belt runs over it, or where it acts as a guide for the ribbed side without needing to drive an accessory.
4. Maintenance
Idler pulleys are wear items and do not typically require routine maintenance beyond periodic inspection. However, regular checks can help identify potential issues before they lead to failure.
Inspection Guidelines:
- Visual Inspection: Periodically inspect the pulley for signs of wear, cracks, or damage to the pulley surface. Ensure the belt is centered on the pulley and not rubbing against its edges.
- Listen for Noise: With the engine running, listen for any squealing, grinding, or chirping noises coming from the pulley. These can indicate worn bearings.
- Check for Play: With the engine off and the belt removed (or tension relieved), gently try to wiggle the pulley. Excessive play or looseness indicates worn bearings or a loose mounting bolt.
- Bearing Condition: Spin the pulley by hand. It should spin smoothly and quietly. Any roughness, resistance, or noise suggests bearing failure.
If any signs of wear or damage are observed, the pulley should be replaced promptly to prevent further damage to the drive belt system or other engine components.
5. Troubleshooting
Common issues related to idler pulleys are typically associated with bearing failure or physical damage.
| Symptom | Possible Cause | Solution |
|---|---|---|
| Squealing or Chirping Noise | Worn or failing pulley bearing; misaligned belt. | Inspect pulley for play and noise. Replace pulley if bearings are worn. Check belt alignment. |
| Grinding or Growling Noise | Severely worn or seized pulley bearing. | Immediate replacement of the pulley is required. |
| Belt Slippage or Premature Wear | Damaged pulley surface; improper belt routing; worn tensioner. | Inspect pulley surface for damage. Verify correct belt routing. Check the condition of the belt tensioner. Replace damaged components. |
| Pulley Wobbling | Loose mounting bolt; worn bearing; bent mounting bracket. | Tighten mounting bolt to specification. Replace pulley if bearing is worn. Inspect and replace bent bracket if necessary. |
If you are unable to diagnose or resolve an issue, it is recommended to consult a certified Mercedes-Benz service technician.
6. Specifications
| Attribute | Detail |
|---|---|
| Brand | Mercedes-Benz |
| Manufacturer Part Number | 000 202 17 19 |
| Item Model Number | 000-202-17-19 |
| OEM Part Number | 000 202 17 19 |
| ASIN | B00KWF5DYG |
| Product Type | Drive Belt Idler Pulley |
| Pulley Type | Smooth |
| Compatibility (Example) | C250, SLK250 (1.8L engines) |
| First Available | June 10, 2014 |
7. Warranty Information
As a genuine Mercedes-Benz OEM product, this idler pulley is typically covered by Mercedes-Benz's standard parts warranty. The duration and terms of the warranty may vary based on your region and the specific purchase conditions. Please retain your proof of purchase.
For detailed warranty information, it is recommended to consult your authorized Mercedes-Benz dealer or refer to the official Mercedes-Benz warranty documentation provided with your vehicle or available through their official channels.
8. Support and Contact
For technical assistance, installation queries, or warranty claims regarding your genuine Mercedes-Benz Drive Belt Idler Pulley, please contact an authorized Mercedes-Benz service center or dealership.
You can find your nearest authorized service center by visiting the official Mercedes-Benz website for your country or region. Always provide the full part number (000-202-17-19) and your vehicle's VIN when seeking support.
Note: This manual is for informational purposes only and does not replace professional automotive service.
