URO Parts 1122000970, Mercedes Belt TensionerCondition:* New Surplus Stock, In OEM Packaging. As Pictured.Additional Notes:* Fitted with a high-quality Japanese NTN/NSK bearing for smooth operation and long life* Coil spring (where applicable) matches OE spring rate for proper belt tension at all engine speeds* High-strength alloy or composite construction withstands engine heat and vibration* Manufactured to OE dimensions for proper clearances and belt alignmentURO Parts 1122000970