From 2005 to 2015, the V8 series of Mercedes M273 engines, which have a volume of 4.7 and 5.5 liters, were put together and installed on a number of pricey German models, including the W211, W221, and X164. These powertrains are known to be among the company’s most troublesome motors.
M113 E43, M113 E50, M113 E55, M119 E42, M119 E50, M119 E60, M156, M157, M177, M273, and M278 are all members of the V8-family.
Specifications
| Production years | 2005-2015 |
| Displacement, cc | 4663 (M 273 KE 46) 5461 (M 273 KE 55) |
| Fuel system | distributed injection |
| Power output, hp | 340 (M 273 KE 46) 388 (M 273 KE 55) |
| Torque output, Nm | 460 (M 273 KE 46) 530 (M 273 KE 55) |
| Cylinder block | aluminum V8 |
| Block head | aluminum 32v |
| Cylinder bore, mm | 92.9 (M 273 KE 46) 98 (M 273 KE 55) |
| Piston stroke, mm | 86 (M 273 KE 46) 90.5 (M 273 KE 55) |
| Compression ratio | 10.7 |
| Features | no |
| Hydraulic lifters | yes |
| Timing drive | chain |
| Phase regulator | yes |
| Turbocharging | no |
| Recommended engine oil | 5W-40 |
| Engine oil capacity, liter | 8.5 |
| Fuel type | petrol |
| Euro standards | EURO 4/5 |
| Fuel consumption, L/100 km (for Mercedes S500 2007) — city — highway — combined |
17.4 8.5 11.7 |
| Engine lifespan, km | ~350 000 |
| Weight, kg | 205 |
The engine was installed on:
- Mercedes CL-Class C216 in 2006 – 2010;
- Mercedes CLK-Class C209 in 2006 – 2010;
- Mercedes CLS-Class W219 in 2006 – 2010;
- Mercedes E-Class W211 in 2006 – 2009; E-Class W212 in 2009 – 2011; E-Class C207 in 2009 – 2011;
- Mercedes G-Class W463 in 2007 – 2015;
- Mercedes GL-Class X164 in 2006 – 2012;
- Mercedes ML-Class W164 in 2007 – 2011;
- Mercedes R-Class W251 in 2007 – 2014;
- Mercedes S-Class W221 in 2005 – 2011;
- Mercedes SL-Class R230 in 2006 – 2011.
Disadvantages of the Mercedes M273 engine
The timing drive is the unit’s weak point, and it is regarded as problematic.
Before 100,000 kilometers, the timing kit must be replaced due to wear on the intermediate gear.
A damper wedge in the exhaust manifold is a frequent cause of engine failure.
Oil frequently seeps through the cylinder heads’ plastic plugs.
Engine overheating may result in detonation and damage to the combustion chamber walls.