Mercedes-Benz M278 engine

M278

The basic M278 has a displacement of 4663 cc with a bore and stroke of 92.9x86 mm. Output is 320 kW at 5,250 rpm with 700 Nm of torque at 1,800-3,500 rpm for S-Class, CL-Class, SL-Class, and GL-Class models. CLS-Class, E-Class, and M-Class models are detuned to 300 kW with 600 Nm of torque at 1,600 rpm. Although it no longer corresponds with the engine displacement, all of the above models are still badged as "550". The GL-Class, besides the GL550 above, also features the GL450 trim that carries a detuned version of the 4.7 L engine making 270 kW and 550 Nm

For 2014 S-Class models (chassis code W222), power is increased to 335 kW at 5,250 rpm, while torque remains at 700 Nm between 1,800-3,500 rpm. .

These engines are mated to the 7G-Tronic 7-speed automatic transmission, and the new 9G-Tronic 9-speed automatic transmission.

Applications:

• 2011–2017 S 500/S 550
• 2011–2014 CL 500/CL 550
• 2015–2017 S 500 Coupé/S 550 Coupé
• 2011–2018 CLS 500/CLS 550
• 2012–2020 SL 500/SL 550
• 2012–2014 E 500/E 550
• 2012–2014 ML 500/ML 550
• 2013–2014 GL 450
• 2013–2019 GL 500/GLS 500/GL 550/GLS 550

M157 AMG {{anchor|M157}}

The second variant, designated M157, is tuned by Mercedes-AMG for use in higher-performance models. This version has a displacement of 5461 cc with a bore and stroke of 98x90.5 mm. Increased power and torque comes from the increased displacement as well as higher boost pressure of 1 bar.

There are six states of output with the M157. For the S-Class and CL-Class, power is 400 kW at 5,500 rpm with 800 Nm of torque at 2,000-4,500 rpm, or 420 kW at 5,500 rpm with 900 Nm of torque at 2,500-3,750 rpm with the optional AMG Performance Package. For the 2013-15 SL-Class, power is 395 kW or 415 kW with the optional AMG Performance Package. For the 2012-2013 E-Class and CLS-Class, power is 386 kW with 700 Nm of torque in standard tune, or 410 kW with 800 Nm of torque with the AMG Performance Package. Beginning with the 2014 E-Class and CLS-Class, power increases to 410 kW 720 Nm of torque for standard tune, or 430 kW with 800 Nm of torque for "S-Model" variants. At the same time for SL-Class, power increases to 430 kW and 900 Nm.

These engines are mated to the AMG Speedshift MCT 7-speed semi-automatic transmission, which replaces the 7G-Tronic's torque converter with a wet clutch pack. Note that this MCT 7-speed can handle considerably more torque and is not the same unit as the dual-clutch transmission found on the Mercedes-Benz SLS AMG.

Applications:

• 2011–2013 S 63 AMG
• 2013–2017 S 63 AMG
• 2011–2014 CL 63 AMG
• 2012–2018 CLS 63 AMG
• 2012–2015 ML 63 AMG
• 2015–2019 AMG GLE 63
• 2012–2016 GL 63 AMG
• 2016–2019 AMG GLS 63
• 2013–2018 G 63 AMG
• 2012–2016 E 63 AMG
• 2012–2019 SL 63 AMG
• 2013–2015 Mercedes-AMG G 63 6x6

The M157 engine will replace the previous M156 in most of the AMG lineup. Despite the 5.5–litre displacement, all models are designated "63" for marketing purposes.

M152

Main article: Mercedes-Benz M152 engine

The third variant, designated M152, is a naturally aspirated derivative of the M157 engine, sharing the same displacement, direct injection, and many other features. The M152 engine includes a cylinder deactivation variable displacement system for improved fuel economy (up to 30 percent better than the M113 E55 engine used in the previous model). Output is 310 kW at 6,800 rpm, with 540 Nm of torque at 4,500 rpm.

Applications

• 2012–2016 SLK 55 AMG (R172)

References

References

1. [http://www.canadiandriver.com/2010/08/10/feature-mercedes%E2%80%99-new-v-engine-family.htm/ Mercedes' New V Engine Family]
2. Davis, Jim. "Mercedes-Benz New V6 and V8 Engines are More Powerful and More Efficient | eMercedesBenz".
3. "Honeywell Turbo Innovations Launched on High Performing Mercedes, Range Rover Engines - Garrett".
4. (March 2010). "2011 Mercedes-Benz S63 AMG".
5. (October 8, 2010). "2012 Mercedes-Benz CLS550 First Drive".
6. [http://www.cars.com/mercedes-benz/gl-class/2013/expert-reviews/?revid=59429 Key specs] cars.com
7. Jacobs, Mike. "2014 Mercedes S-Class Sets New Standards in Automotive Development | eMercedesBenz".
8. "2011 Mercedes-Benz S63 AMG - 2010 Geneva Auto Show Coverage, New Car Reviews, Concept Cars - Automobile Magazine".
9. [http://tothefloor.com/wp-content/uploads/2010/03/AMG-Turbo-Engine.jpg AMG Turbo Engine] tothefloor.com
10. Clark, John. "2012 Mercedes-Benz CLS-Class In-Depth Overview | eMercedesBenz".
11. Davis, Jim. "2014 Mercedes E63 AMG 4MATIC and S-Model Officially Revealed | eMercedesBenz".
12. "2014 Mercedes CLS 63 AMG S-Model Variant Announced | eMercedesBenz".
13. "Detailed specs review of 2017 Mercedes-AMG SL 63 model for Europe".
14. Serban, Tudor. "MERCEDES BENZ SL 63 AMG (R231) Specs & Photos - 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023".
15. "2016 Mercedes-Benz Mercedes-AMG SL 63 R 231 specifications, technical data, performance".
16. "Specifications for Mercedes-Benz SL 63 AMG, 585hp, 2015".
17. [https://nationalpost.com/cars/Preview+2012+Mercedes+Benz/5064914/story.html nationalpost.com]{{dead link. (October 2025)
18. "2011 Mercedes-Benz S63 AMG first drive - 1 - - Autos - MSN CA".
19. "2012 Mercedes-Benz E63 AMG First Drive - Motor Trend".
20. (21 November 2011). "2012 Mercedes-Benz SLK55 AMG".
21. (2011-07-21). "Mercedes-Benz details new variable-displacement V8 for SLK55 AMG". Autoblog.