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Mercedes-Benz M137 specs: 5.8L (353 ci) 12-cylinder, 84 x 87 mm (3.3071 x 3.4252 in) bore and stroke, 10:1 compression. Built 2001–2002.
The Mercedes-Benz M137 is close to square: 3.3071" bore against 3.4252" stroke, within 3.4%, which splits the difference between a high-revving layout and a torque layout. The 3.4252" stroke puts mean piston speed at 4,000 ft/min around 7,000 RPM, which is where a production bottom end is generally considered at its limit. Each of the 12 cylinders displaces 29.4 ci (482 cc).
10:1 is in the range that usually runs on pump premium.
2 factory variants share these dimensions across 2001–2002.
| Displacement | 353 ci / 5.8 L |
|---|---|
| Bore | 3.3071" |
| Stroke | 3.4252" |
| Cylinders | 12 |
| Compression ratio | 10:1 |
| Bore/stroke ratio | 0.966 |
| Fuel type | gas |
|---|---|
| Years | 2001–2002 |
| Bore/stroke character | 0.966 — square — bore and stroke are within 5%, a balanced compromise |
|---|---|
| Mean piston speed at 6,000 RPM | 3,425 ft/min — conservative for a street engine |
| Displacement per cylinder | 29.4 ci |
| Static compression | 10:1 — in the range that usually runs on pump premium |
Each link opens the calculator with this engine's specs already filled in.
These records share identical bore, stroke, displacement and compression. They differ by model year and factory power rating.
| Year | Advertised HP | Code |
|---|---|---|
| 2001 | — | M137 |
| 2002 | — | M137 |
1 factory vehicle, 2001–2002. Each year opens that model's engine table.