Mercedes Benz Classics: Owners Operation, Service, and Repair Workshop Manuals

Mercedes M276 Petrol Engine Manuals

The Mercedes-Benz M276 90° V6 petrol engines are manufactured in 3 versions with two displacements of 3.0 L (2,996 cc) and 3.5 L (3,498 cc) and were produced from 2010-2017

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Download: MB M276 Engine Introduction Into Service

Mercedes M276 Engine Introduction into Service Manual

Mercedes Benz M276 Engine Introduction
Overview Manual: Describes engine components, operation, specs
Application: M276, M278 DE and KE Variants
Download: 30.5 mb, 85 pages, Format: .pdf

USD $9.95

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M276 Engine Technical Data

The Mercedes-Benz M276 engine is a direct injected 60 degree V6 engine that is related to the Chrysler Pentastar V6, with which it shares its basic architecture. The 60 degree vee-angle eliminates the need for a balance shaft, improving refinement while reducing mechanical complexity.

The M276 engine features an aluminum engine block with Nanoslide cylinder coating and dual overhead camshafts with independent variable valve timing on 12 intake and 12 exhaust valves along with a new 2-stage timing chain arrangement. They include direct injection with piezo-electrically controlled injectors for 2 to 3 sprays per intake stroke in normal operation. Multi-spark ignition creates up to 4 sparks per cycle, and the demand-controlled fuel pump, water pump, oil pump and alternator reduce parasitic loads.

The turbocharged smaller displacement DELA 30 variant was introduced in 2013 in the C400 (W205) and other models. For 2014 a larger displacement turbocharged variant DELA 35 was released in the CLS400, and in 2015, the DE30AL version was created for AMG models with higher boost and slightly lower compression ratio (10.5:1).

Mercedes-Benz M276 Motor

Specifications

M276 DE35

  • Production 2010-2017
  • Configuration Naturally aspirated 60° V6
  • Displacement 3.5 L (3,498 cc)
  • Cylinder bore 92.9 mm (3.66 in)
  • Piston stroke 86 mm (3.39 in)
  • Valvetrain DOHC with VVT
  • Fuel system Direct injected
  • Power output 248–302 hp (185–225 kW; 251–306 PS)
  • Torque output 340–370 Nm (251–273 lb-ft)

M276 DE30

  • Production 2013-
  • Configuration Turbo Charged 60° V6
  • Displacement 3.0 L (2,996 cc)
  • Cylinder bore 88 mm (3.46 in)
  • Piston stroke 82.1 mm (3.23 in)
  • Valvetrain DOHC with VVT
  • Turbocharger Twin-turbo
  • Fuel system Direct injected
  • Power output 333–362 hp (248–270 kW; 338–367 PS)(DELA30-DE30AL)
  • Torque output 480–521 Nm (354–384 lb-ft)(DELA30-DE30AL)

M276 DELA35 (DE35AL)

  • Production 2014-2018;
  • Configuration Turbo Charged 60° V6
  • Displacement 3.5 L (3,498 cc)
  • Cylinder bore 92.9 mm (3.66 in)
  • Piston stroke 86 mm (3.39 in)
  • Valvetrain DOHC with VVT
  • Turbocharger Twin-turbo
  • Fuel system Direct injected
  • Power output 333 hp (248 kW; 338 PS)
  • Torque output 480 Nm (354 lb-ft)

Mercedes M276 Engine Versions

Version Features and Applications

DE35

Three variants of the normally aspirated M276 DE 35 engine were produced with a displacement of 3.5 L (3,498 cc), bore and stroke of 92.9 mm × 86 mm (3.66 in × 3.39 in). Output of the first variant introduced in 2010 the C350 CGI BlueEfficiency has a 12.2:1 compression ratio with 215 kW (292 PS; 288 hp) at 6400 rpm and 365 Nm (269 lb-ft) of torque at 3000-5100 rpm. Output of the second variant with 12.2:1 compression ratio is 225 kW (306 PS; 302 hp) at 6500 rpm with 370 Nm (273 lb-ft) of torque at 3500-5250 rpm. The S350, CLS350, ML350, E350 and W204 C350 models received the higher output version from 2011 to 2015 with the S400h hybrid model using it from 2012 to 2017 in combination with an electric motor. Additionally a detuned version in the C300 was also used in the E300 and S300 from model year 2013 to 2015, producing 248 hp (185 kW; 251 PS) and 251 lb-ft (340 Nm) of torque.

DE30

The DELA 30 engine was introduced in the 2014 C400 (W205), and used for E400 Coupe 4Matic, ML(GLE)400 4Matic, E450 4Matic, CLS450, S450, S500e and other models. With a reduced bore and stroke at 88 mm × 82.1 mm (3.46 in × 3.23 in) and reduced compression ratio at 10.7:1, the DELA 30 was turbocharged with twin IHI turbochargers for 245 kW (329 hp; 333 PS) at 5,250-6,000rpm and 480 Nm (354 lb-ft) of torque at 1,600-4,000 rpm.

For 2015-2016, a higher output version called DE30AL was also offered with 362 hp (270 kW; 367 PS) and 384 lb-ft (521 Nm) on higher boost and 10.5:1 compression ratio for the C450 AMG and GLE450 AMG. This engine powers the 2017-on AMG SLC43, AMG C43 and AMG GLE43[8], as well as 2018-on E450 4Matic, S560e and other models.

DELA35

The same bore and stroke of the normally aspirated DE35 (92.9 mm × 86 mm (3.66 in × 3.39 in)) are used for this turbocharged version, with a lower boost level than the DELA30 on the same twin turbocharged format using a different model IHI turbocharger. Power and torque remained the same, but this larger displacement lower boost model benefits from lower fuel consumption and was referred to as DE35AL, offered on S400, CLS400, E400 4Matic (up to 2018), E450 as well as the Maybach S400 4Matic models up to 2017.

Mercedes Benz M276 Engine Cutaway