M18
Inline-6- 18 2.9 L · 2,867 cc
61 PS
45 kW · 60 hp a 3,200 giri/min
Mercedes-Benz Executive Sedan · Typ 290
The 290 — a long-wheelbase six for the mid-1930s.

The Typ 290's extended wheelbase distinguished it from shorter mid-range models, giving coachbuilders room for spacious rear compartments and elegant rooflines suited to professional and institutional clients. Its inline-six provided smooth, dependable power aligned with Mercedes-Benz's reputation for engineering quality in the executive segment.
Production ran from 1933 to 1937, and 7,405 examples were built. The Typ 290 occupied a stable niche in the company's 1930s catalogue — less common than the high-volume Typ 200, but a consistent choice for buyers who valued wheelbase and comfort over outright sportiness.

2 distinct series across 1933–1937 — each identified by its chassis and engine numbers from period factory data.
| Modello | Model year | Telaio | Motore | Cambio | Totale |
|---|---|---|---|---|---|
| Type 290 Sedan | 1933–1937 | 18 | 18 | 3,476 | |
| Type 290 LWB | 1934–1937 | 18 | 18 | 3,929 |
* Il dato di produzione pubblicato copre tutte le serie di quel modello; la fonte non lo scompone ulteriormente.


The M18 as fitted to the W18.
61 PS
45 kW · 60 hp a 3,200 giri/min