The 2.0-liter Mercedes OM654 diesel engine has been assembled by the concern only since 2016 and is distinguished by an aluminum cylinder block with Nanoslide cast iron plasma spraying. There is a version of the transverse arrangement OM654q and an updated modification of OM654M, as well as a modification with a volume of 1.6 liters.
The diesel R4-family includes: OM616, OM601, OM604, OM611, OM640, OM646, OM651, OM654, OM668.
Specifications
| Production years | since 2016 |
| Displacement, cc | 1597 (DE 16 G SCR) 1950 (DE 20 G SCR) 1950 (q DE 20 SCR) 1993 (M DE 20 G SCR) |
| Fuel system | Common Rail |
| Power output, hp | 122, 160 (DE 16 G SCR) 150, 194, 245 (DE 20 G SCR) 116 – 190 (q DE 20 SCR) 163 – 265 (M DE 20 G SCR) |
| Torque output, Nm | 300, 360 (DE 16 G SCR) 360, 400, 500 (DE 20 G SCR) 280 – 400 (q DE 20 SCR) 380 – 550 (M DE 20 G SCR) |
| Cylinder block | aluminum R4 |
| Block head | aluminum 16v |
| Cylinder bore, mm | 78 (DE 16 G SCR) 82 (DE 20 G SCR) 82 (q DE 20 SCR) 82 (M DE 20 G SCR) |
| Piston stroke, mm | 83.6 (DE 16 G SCR) 92.3 (DE 20 G SCR) 92.3 (q DE 20 SCR) 94 (M DE 20 G SCR) |
| Compression ratio | 15.5 |
| Features | AdBlue |
| Hydraulic lifters | yes |
| Timing drive | chain |
| Phase regulator | no |
| Turbocharging | Garrett GTD1449VZ (DE 16 G SCR) Garrett GTD1449VZ / BorgWarner R2S for 245 hp version (DE 20 G SCR) Garrett GTD1449VZ (q DE 20 SCR) BorgWarner R2S (M DE 20 G SCR) |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 6.5 |
| Fuel type | diesel |
| Euro standards | EURO 6 |
| Fuel consumption, L/100 km (for MB E 220 d 2017) — city — highway — combined |
6.5 4.7 5.4 |
| Engine lifespan, km | ~240 000 |
| Weight, kg | 168.4 |
The engine was installed on:
- Mercedes A-Class W177 since 2018;
- Mercedes B-Class W247 since 2018;
- Mercedes C-Class W205 in 2018 – 2021; C-Class W206 since 2021;
- Mercedes CLA-Class C118 since 2019;
- Mercedes CLS-Class C257 since 2018;
- Mercedes GLA-Class H247 since 2020;
- Mercedes GLB-Class X247 since 2019;
- Mercedes GLC-Class X253 since 2019;
- Mercedes GLE-Class V167 since 2018;
- Mercedes E-Class W213 since 2016;
- Mercedes V-Class W447 since 2019.
Disadvantages of the OM654 engine
- A well-known weak point of this diesel unit is the small resource of rockers.
- If you miss this problem, you will have to change the camshaft and hydraulic lifters.
- The Bosch CP4 fuel system with piezo injectors does not tolerate bad fuel at all.
- Even from bad diesel fuel, intake channels in the cylinder head and valves are quickly overgrown with soot.
- As always, environmental bells and whistles bring a lot of trouble: EGR, SCR and particulate filter.
