The Mercedes-Benz M272 is a refined and capable engine that offers a great driving experience. By understanding its parts diagram and being aware of its common issues—especially the balance shaft—you can make an informed decision and keep your Mercedes-Benz running smoothly for miles to come.
Introduced in 2004, the Mercedes-Benz M272 is a 90-degree V6 engine family that replaced the beloved M112. Known for its smooth power delivery and advanced technology, it was Mercedes-Benz’s workhorse throughout the 2000s, powering everything from the sporty SLK (R171) to the executive E-Class and the spacious R-Class.
Electronic throttle control. 3. Cylinder Head and Valvetrain
: New design cast aluminum heads featuring four overhead camshafts and four valves per cylinder. Valvetrain & Timing Camshaft Adjusters
The DOHC (Double Overhead Camshaft) cylinder heads are cast from aluminum and house 4 valves per cylinder. Mercedes Benz M272 Engine Parts Diagram
Plastic guides that are known to break and fall into the oil pan.
: The engine is kept cool by an advanced electronic coolant flow control system that replaced a mechanical thermostat for better temperature regulation and faster warm-up.
A hydraulic element that keeps correct pressure on the timing chain.
The timing system is the most critical area for high-mileage M272 engines, especially those produced between 2004 and 2008. The Mercedes-Benz M272 is a refined and capable
Four external electromagnets that control oil flow to the VVT gears; notorious for leaking oil into the wiring harness.
Aluminum pistons with low-friction coatings attached to fractured-cap steel connecting rods.
: These internal flaps improve air/fuel mixture at low engine speeds. A common failure point is the plastic actuator lever that controls these flaps, which can break and lead to "Check Engine" lights.
The M272 engine assembly consists of several distinct mechanical systems: Motor Mechanicals Known for its smooth power delivery and advanced
Houses a dual overhead cam (DOHC) setup with four valves per cylinder. Variable Valve Timing:
Convert linear piston motion into rotational force.
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