Mercedes M272 3.5L Engine Specs, Problems, Reliability. This engine appeared in 2004 as the brand-new engine for Mercedes-Benz SLK 350 R171. M272 series is the new generation of V6 Mercedes engines. The 3.5-liter engine pertained to replace the old M112 E32 and M112 E37 engines.
The M112 engine lies at the base of M272 engine style. There is aluminum cylinder block with 90 degrees angle, forged steel linking rods and light pistons. The measurement between cylinders is the same 106 mm. The M272 engine likewise has a balancer shaft inside the engine block. The engine has aluminum cylinder heads with 4 valve per cylinder and 2 overhead camshafts (DOHC). The diameter of the intake valve is 39.5 mm, exhaust – 30 mm.
The engine was equipped with all modern-day innovations of engine development. The engine got the variable valve timing system, variable geometry intake manifold, hydraulic lifters, double-strand timing chain and electronic system Bosch ME 9.7.
The M273 E46 and M273 E55 engines are the part of this one family. The new version of the M272 V6, which name is M276 DE35, came out in 2011.
Table of Contents
M272 KE/DE 35 3.5 l Engine Problems and Reliability
1. Oil Leakages. Inspect the plastic plugs of cylinder heads; perhaps they require to be replaced.
2. Consumption manifold valves problem. The engine runs unstably with that issue. Since of required altering of the consumption manifold complete, to fix it is really pricey. This problem occurs on engines till 2007.
you must see more engine detail in here: Engine – US Cars News or you can see on wiki here
Mercedes M272 3.5L Engine Specs
| Manufacturer | Stuttgart-Bad Cannstatt Plant |
| Production years | 2004-2013 |
| Cylinder block material | Aluminum |
| Cylinder head material | Aluminum |
| Fuel type | Gasoline |
| Fuel system | Fuel injection |
| Configuration | V |
| Number of cylinders | 6 |
| Valves per cylinder | 4 |
| Valvetrain layout | DOHC |
| Bore, mm | 92.6 |
| Stroke, mm | 86.0 |
| Displacement, cc | 3498 |
| Type of internal combustion engine | Four-stroke, naturally aspirated |
| Compression Ratio | 10.7, 12.2, 11.7 |
| Power, hp | 258/6000 272/6000 292/6400 305/6500 |
| Torque, lb ft | 250/2500 258/2400 270/3000 265/4900 |
| Engine weight | – |
| Firing order | 1-4-3-6-2-5 |
| Engine oil weight | 0W-30, 0W-40, 5W-30, 5W-40 |
| Engine oil capacity, liter | 8.0 |
| Oil change interval, mile | 6,000 |
| Applications | C 350 W203, C 350 W204, CLK 350 C209, CLS 350 W219, GLK 350 X204, E 350 W211, E 350 W212, ML 350 W164, S 350 W221, SL 350 R230, SLK 350 R171, Sprinter, Viano 3.5/Vito 126, R 350, CLC 350 |
