PCV Oil Separator Diaphragm – Mercedes W177 M260 M264 2.0T | OEM A2600109800
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. 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.
Fits OEM #A2600109800.
When to Inspect This Part
- whistling or excessive crankcase vacuum
- rough or unstable idle
- increased oil consumption
- oil residue in the intake
- smoke after warm-up
- mixture faults or an intake air leak
What's Included
- 1× PCV oil separator diaphragm (OEM A2600109800 / A2600100300)
OEM Part Numbers and Vehicle Fitment
Additional confirmed fitment
- Mercedes-Benz A 220 (W177)
- Mercedes-Benz A 220 4MATIC (W177)
- Mercedes-Benz A 250 (W177)
- Mercedes-Benz A 250 4MATIC (W177)
- Mercedes-Benz A 35 AMG 4MATIC (W177)
Part Number / PN
A2600109800, A2600100300, 2600109800, 2600100300
Important Fitment Check
Before ordering, compare the part design, dimensions, connectors, and every available OEM/P/N marking with the part installed on the vehicle. Matching OEM/P/N A2600109800 is the primary fitment check.
FAQ
How do I confirm fitment for this PCV Oil Separator Diaphragm?
Compare the exact OEM/P/N and physical design with the installed part. The primary reference is A2600109800. Do not select the part by vehicle model alone.
What symptoms may indicate a problem with this PCV Oil Separator Diaphragm?
Confirmed symptoms include whistling or excessive crankcase vacuum, rough or unstable idle, increased oil consumption, oil residue in the intake. Diagnose the original assembly before ordering so another fault is not mistaken for this part.
What is included with this PCV Oil Separator Diaphragm?
The confirmed kit contents are: 1× PCV oil separator diaphragm (OEM A2600109800 / A2600100300).
Does this listing include the complete surrounding assembly?
No. It includes only the item or repair components identified for this SKU. Inspect related parts separately and replace them only when diagnosis confirms a fault.
What should be checked before installation?
Check the OEM/P/N, dimensions, connectors, orientation, and condition of the mating components. Installation should follow the correct service procedure for the specific vehicle and assembly.
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Orders ship within 1–2 business days.
Standard delivery:
- USA: Some items ship from our US warehouse and arrive within 3 business days.
- USA-EU: 10–21 business days
- Worldwide: 14–30 business days
Shipping cost is shown at checkout.
Can I exchange or return an item?
Yes, you can exchange or return an item within 14 days of purchase. This right is guaranteed to you by the Law on the Protection of Consumer Rights
To use this feature, please make sure that:
- the product was not in use and has no traces of use: scratches, chips, abrasions, etc.
- the goods are fully completed and the integrity of the packaging is not violated
- retained all labels and factory markings