Mercedes-Benz M 276 V6 petrol engine

Mercedes Benz
M 276
Manufacturer:	Mercedes Benz
Production period:	since 2011
Style:	V , six-cylinder
Engines:	3.0 liters  (2996 cc)  3.5 liters  (3498 cc)
Previous model:	M 272
Successor:	M 256

The Mercedes-Benz M 276 is a series of six-cylinder - V-engines ( gasoline engines ), the Mercedes-Benzsince the fall of 2010 as a successor to the M-272 produces generation. Compared to its predecessor, the cylinder bank angle is reduced from 90 ° to 60 °, so that even without balance shaft no free mass moments of the first order occur. The main components are manufactured in the engine plant Stuttgart-Bad Cannstatt , where the assembly of the engine takes place.

The engine generation is closely related to the eight-cylinders of the M 278 series, although they have 90 ° cylinder bank angles. The M 276 debuted in the spring of 2011 in the facelifted C-Class (model series 204), in the SLK (R 172) and in the CLS (model series 218) as well as in numerous 4Matic models.

At the beginning, only aggregates with 3.5 liters of displacement were used. Since the spring of 2013, a reduced displacement in three-liter engine, which is charged by means of two turbochargers offered.

M 276 DES 35

The displacement of the six-cylinder - V-type engine is 3498 cm³ with a bore of 92.9 mm and a stroke of 86 mm, at a cylinder distance of 106 mm. The compression ratio is 12.2: 1. The crankcase, the pistons and the cylinder head of the engine are made of aluminum, with the cylinder liners made of gray cast iron. In the 225 kW (306 hp) variant, the engine weighs 170.6 kg according to DIN standards. The change of charge is controlled via four valves per cylinder ( four-valve technology ) and per cylinder bank two overhead camshafts driven by a timing chain . In addition, the engine has a camshaft adjustment for intake and exhaust side.

A third-generation spray-guided gasoline direct injection (200 bar fuel pressure) with BlueDirect combustion technology and piezo injectors is used. This, in conjunction with a multi-ignition and the new stratified combustion process with extended map range including consumption-optimized lean-burn, should contribute to reduced fuel consumption. The power consumption of ancillaries has been lowered. These include an optimized water pump with second-generation heat management, a regulated oil pump, a volume-controlled high-pressure fuel pump and intelligent generator control. Thanks to consistent lightweight construction and intensive fine tuning, engine friction has also been significantly reduced compared to the predecessor engine. Together with the start-stop technology , the shift point shift and friction power reduction, overall improvements in driving efficiency of more than 20 percent were possible. 

M 276 DEH 30 LA

The displacement of this variant is 2996 cc with an identical stroke-bore ratio as the 3.5-liter variant (bore 88 mm, stroke 82.1 mm). The compression ratio is 10.7: 1. In the 245 kW (333 hp) variant, the engine weighs 179.2 kg according to DIN standards.To optimize the cylinder bore, the so-called NANOSLIDE® coating is used for the first time in an aluminum die-cast crankcase . This is an iron-carbon layer, which is applied by means of arc wire spraying directly on the aluminum surface and allows high oil retention volume in the cylinder bore. 

The engine has a turbocharger with one turbocharger per cylinder bank ( bi-turbo ). The compressed fresh air is cooled in a water-to-air intercooler designed in countercurrent flow and then fed to the cylinder banks via a common charge air distributor. The intercooler has a separate low-temperature cooling water circuit. The first use of this engine variant took place in spring 2013 in the E400 (212 series) .

M 276 DES 35 LA 

This variant of the 3.5-liter engine, which has been used since 2014, has now also been converted to turbocharging. However, in contrast to the 3.0-liter variant, the engine still has the stratified combustion process, which requires a NOx storage catalytic converter to comply with the emission limit values.

Variants

M 276 DEH 30 LA red.

M 276 DEH 30 LA

M 276 OF 35 red 

M 276 DES 35 

M 276 DES 35 LA