The A6510109018 is an OEM part number for the engine PCV (Positive Crankcase Ventilation) valve cover or rocker cover repair kit specifically designed for Mercedes-Benz B-Class (W246) models. It is also referred to as a crankcase rebreather or breather valve and is a vital component for regulating pressure and removing harmful oil vapours from the engine crankcase.
This part is a pressure-controlled breather valve that typically includes a rubber diaphragm and seals to prevent oil leaks and maintain engine vacuum.
Maintenance and Symptoms
Experts recommend replacing the PCV valve approximately every 80,000 miles (130,000 km) or every 3 years. Common signs that this part needs replacement include:
Oil Leaks: Often leak onto the catalytic converter or exhaust, causing a burning smell or smoke.
Rough Idling: A failing valve can cause the engine to run rough or experience reduced power.
Internal Damage: The rubber diaphragm inside the A6510109018 can become brittle and crack, potentially sending debris into the air intake manifold.
Testing Tip: You can check a PCV valve by shaking it; a healthy valve should make a solid metallic clicking sound.
Vehicle Compatibility
While primarily listed for the Mercedes-Benz B-Class (W246/W242), it has broad fitment across several 2012-2019 models:
Mercedes-Benz B-Class (W246): B180, B200, B220, and B250 (both Petrol and Diesel variants).
Mercedes-Benz A-Class (W176): A180, A200, A250 (2013-2018).
Mercedes-Benz CLA (C117): CLA180, CLA200, CLA250 (2014-2018).
Mercedes-Benz GLA (X156): GLA180, GLA200, GLA250 (2014-2018)
What's in the box
1 x Housing
1 x Spring
1 x Diaphragm
