Stable crankcase ventilation and intake system protection for Mercedes-Benz M270 and M274 1.6T/2.0T turbo engines with this OEM oil separator breather pipe, part number A2700109703. Applicable to 2011–2019 A-Class, B-Class, CLA and GLA compact models, it filters crankcase blow-by gas, separates residual oil mist and recirculates clean gas back to the engine intake system.
Integrated plastic and rubber composite structure is optimized for engine crankcase ventilation circuits, resisting erosion from high-temperature oily gas, intake vacuum pressure and variable underhood temperature changes. Its original-equipment assembly structure, precise interface size and tight-fit connecting ends ensure fully sealed installation to avoid abnormal air intake. Clogged or damaged stock breather pipes cause excessive oil consumption, rough idle and severe carbon deposition on intake valves. This OEM-grade replacement pipe restores efficient crankcase ventilation, reduces engine carbon buildup, stabilizes air-fuel mixing ratio and effectively protects Mercedes compact turbo engines from long-term operational failure.