Oil Consumption on Your Mercedes A-Class 2.0T? Replace the PCV Diaphragm for $16.
The PCV (positive crankcase ventilation) oil separator diaphragm on Mercedes M260 and M264 2.0T engines (W177) degrades over time, causing oil blow-by into the intake, excessive oil consumption, and blue smoke under boost. OEM P/N A2600109800 (also A2600100300) is the correct replacement diaphragm — rebuild the separator for a fraction of assembly cost.
✓ What You Get: PCV oil separator diaphragm for Mercedes M260/M264 2.0T — stops oil blow-by into intake and reduces oil consumption.
What's Included
- 1× PCV oil separator diaphragm (OEM A2600109800 / A2600100300)
Why Replace?
- Stops Oil Blow-By: Failed diaphragm no longer separates oil droplets from crankcase vapors.
- Reduces Oil Consumption: Oil stays in the crankcase instead of being ingested through the intake.
- Clears Blue Smoke: Eliminates blue exhaust smoke under acceleration and boost.
- Saves $150+ vs Assembly: New OEM separator assembly costs $180+; this diaphragm rebuilds it for $16.
- 20-Minute Rebuild: Open separator housing, swap diaphragm, reassemble.
Vehicle Compatibility
| Make | Series / Model | Engine |
|---|---|---|
| Mercedes-Benz | A-Class W177 | M260/M264 2.0T |
| Mercedes-Benz | CLA, GLA — verify P/N | M260/M264 2.0T |
About This Part
The Mercedes M260/M264 PCV oil separator diaphragm (OEM A2600109800, also listed as A2600100300) is the wear component inside the crankcase ventilation separator on the W177 A-Class and related platforms. Diaphragm failure is one of the most common causes of oil consumption, intake oiling, and blue smoke on these 2.0T engines.
⚠ Verify Part Number Before Ordering: Cross-check A2600109800 or A2600100300 against your separator assembly before purchasing.
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