Mercedes M272 engine

Content

Specifications M272
Where is the engine number
Modifications to the M272 engine
Problems and Weaknesses
Tuning
Video about M272: the reason for the appearance of scoring

The Mercedes-Benz M272 engine is a V6 introduced in 2004 and used throughout the 00s. There are several aspects that distinguish it from its predecessors. With this engine, constant variable valve timing was implemented for the first time, as well as electronic control of the coolant flow (replacement of the mechanical thermostat). Like the M112 engine, it also uses a balance shaft mounted between the cylinder banks in the cylinder block to eliminate vibrations.

Specifications M272

The M272 engine has the following characteristics:

manufacturer - Stuttgart-Bad Cannstatt Plant;
years of release - 2004-2013;
cylinder block material - aluminum;
head - aluminum;
type of fuel - gasoline;
fuel system device - injection and direct (in the version of the 3,5-liter V6);
number of cylinders - 6;
power, h.p. 258, 272, 292, 305, 250, 270, 265.

Where is the engine number

The engine number is located behind the left cylinder head, near the flywheel.

Modifications to the M272 engine

The engine has the following modifications:

Modification	Working volume [cm³]	Compression ratio	Power [kW / hp. from.] turnovers	Torque [N / m] turnovers
M272 KE25	2496	eleven	150/204 at 6200	245 at 2900-5500
M272 KE30	2996	eleven	170/231 at 6000	300 at 2500-5000
M272 KE35	3498	eleven	190/258 at 6000	340 at 2500-5000
M272 KE35		eleven	200/272 at 6000	350 at 2400-5000
M272 DE35 CGI		eleven	215/292 at 6400	365 at 3000-5100
M272 KE35 Sportmotor (R171)		eleven	224/305 at 6500	360 at 4900
M272 KE35 Sportmotor (R230)		eleven	232/316 at 6500	360 at 4900

Problems and Weaknesses

Oil leaks. Check the plastic cylinder head plugs - they may need to be replaced. This is the cause of most leaks that occur.
Intake manifold valves defective. The engine runs unstable when faced with this problem. In this case, a complete replacement of the intake manifold is required. This problem occurs on engines prior to 2007 and is one of the most time consuming to troubleshoot.
Unfortunately, most Mercedes-Benz E-Class models with the M272 engine produced between 2004-2008 have problems with the balance shafts. This is by far one of the most common faults. When the balance shaft gears begin to fail, you'll likely hear a squealing sound - always a clear sign of engine trouble. The specific culprit for this problem is usually a prematurely worn sprocket.

Tuning

The simplest way to slightly increase power is associated with chip tuning. It consists in the removal of catalysts and the installation of a filter with reduced resistance, as well as in sports firmware. An additional advantage that the owner of the car receives in this case is from 15 to 20 horsepower. Installing sports camshafts gives another 20 to 25 horsepower. With further tuning, the car becomes inconvenient for moving in urban areas.