Mercedes W204 W211 W212 C219 Crankshaft 3.5 350 CGI M272.983 Petrol A2720301101

Mercedes W204 W211 W212 C219 Crankshaft 3.5 350 CGI M272.983 is an original component from the Crankshafts group, designed for Mercedes petrol engines. This used OEM crankshaft ensures the correct geometry of the crank-piston system, stable operation of the 3.5 CGI unit, and the preservation of factory standards for performance and durability. It is a solution for users who expect a technically correct repair without compromising on fitment.

Specifications and technical data

• SKU: A2720301101
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2720301101
• Substitutable numbers: A2720301101, A 272 030 11 01
• Fuel type: Petrol
• Category: Crankshafts

Purpose and compatibility

The presented crankshaft is designed for the M272.983 family petrol engine, used in Mercedes W204, W211, W212, and C219 models with the 3.5 350 CGI unit. Using an original crankshaft from the same engine family allows for maintaining factory balance parameters, which translates into smoother engine operation, reduced vibrations, and lower stress on the main and connecting rod bearings.

Technical characteristics of the crankshaft

The crankshaft in a 3.5 CGI petrol engine is responsible for converting the reciprocating motion of the pistons into rotational motion transmitted to the transmission. In this type of unit, the following are crucial:

• precise dynamic balancing,
• properly shaped main and connecting rod journals,
• oil channels ensuring stable lubrication,
• resistance to loads resulting from the high rotational speeds of the petrol engine. By maintaining the factory crankshaft design, it is possible to maintain correct oil pressure in the bearing zone and reduce the risk of premature wear of the bearing shells. This is particularly important in higher-power petrol units, such as the 3.5 CGI.

Application in petrol engine repairs

Replacing the crankshaft is recommended in cases of serious damage to the crank-piston system, such as bearing seizure, excessive journal clearance, or visible signs of overheating. Using an original element from the Crankshafts group allows you to:

• restore the correct geometry of the shaft and the alignment of the system,
• maintain compliance with Mercedes factory assembly tolerances,
• reduce the risk of torsional vibrations and engine noise,
• maintain proper cooperation with the flywheel and vibration dampers. In the case of petrol units used in Mercedes C, E, and CLS class vehicles, the correct selection of the crankshaft has a direct impact on the durability of the entire engine, including the timing chain, bearings, and seals.

Benefits of using an original Mercedes crankshaft

The original crankshaft for Mercedes provides a number of practical benefits in daily operation:

• Factory fit – full compatibility with the engine block, connecting rods, and 3.5 CGI unit accessories.
• Stable engine operation – reduction of vibration and noise due to maintaining proper balance.
• Hassle-free installation – no need for alterations, adjustments, or structural modifications.
• Optimal lubrication – properly designed oil channels support the durability of bearings and journals. This solution is particularly beneficial for professional petrol engine overhauls, where repeatability of parameters and compliance with the manufacturer's service documentation are essential.

Additional information and related materials

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other elements from the same group, such as other shafts, components working with the shaft, or crank system parts, check the available parts in the Mercedes Crankshafts category. For a better understanding of the drivetrain operation in all-wheel-drive vehicles and the impact of individual components on the durability of the powertrain, it is worth reading an article describing various AWD systems – comparison of xDrive, 4Matic, quattro, and 4Motion drives. This will allow you to better assess the importance of correctly selected engine components in the entire drivetrain system.