Mercedes-Benz W202 W210 W170 M111Engine Oil Pump - Used Original Parts

Mercedes-Benz W202 W210 W170 M111Engine Oil Pump - Used Original Parts

Diagnosis and Common Symptoms

As a master technician, I constantly remind clients that the oil pump is the mechanical heart of your engine. In the Mercedes-Benz W202, W210, and W170 chassis, oil pump degradation typically presents through critical hydraulic pressure drops rather than instant catastrophic failure. The most immediate symptom is the illumination of the red low oil pressure warning indicator on the instrument cluster, particularly noticeable during warm idle when the oil viscosity is at its lowest. Mechanically, you will hear pronounced valve lifter ticking, chain rattle, or deeper rotational knocking from the lower block due to oil starvation at the main bearings. Common failure points include a sticking internal pressure relief valve caused by extended service intervals, excessive clearance wear between the inner and outer rotors, or a heavily restricted oil pickup screen. Fault codes are rarely stored in the ME control unit for this specific era; diagnosis relies heavily on mechanical gauge testing to verify that baseline pressure holds above 1.0 bar at idle and scales correctly with engine RPM.

Introduction

When dealing with internal engine lubrication, compromising on component quality is never an acceptable practice. This is a Genuine Used engine oil pump that has been meticulously evaluated to ensure it meets original factory flow and pressure tolerances. Every unit is strictly tested for rotor clearance, bypass valve actuation, and overall structural integrity before being approved for inventory. By utilizing a tested original part, you guarantee the precise volumetric efficiency and structural reliability required to protect your engine's internal components.

Product Details

• Brand: Mercedes-Benz
• Model Compatibility: W202 C-Class, W210 E-Class, W170 (R170) SLK-Class
• Part Name: Engine Oil Pump
• Condition: Genuine Used (Tested Working)
• Notes: Gear clearances have been measured to ensure they fall within factory service limits. The pressure relief valve has been inspected for binding, and the pickup tube assembly is verified free of sludge and debris. Professional installation with a new factory-spec chain and tensioner is highly recommended.