M04
Inline-6- 04 3.1 L · 3,131 cc
56 PS
41 kW · 55 hp / 3,200 转/分
162 N·m
119 lb·ft / 1,200 转/分
Mercedes-Benz Executive Sedan · Typ 300 / 320
The 12/55 PS line, briefly continued into 1928.

Arriving in 1927 as a continuation and enlargement of the Typ 300 line, the 300/320 shared the engineering philosophy of its predecessor while offering coachbuilders a more generous platform for formal saloons and open touring bodies. It sat in a transitional moment, as Mercedes-Benz sorted its model hierarchy for the late 1920s.
Production was brief and modest: just 202 examples between 1927 and 1928. The short run underscores how quickly the company's executive range evolved, as newer chassis absorbed the role the 300/320 had been meant to fill.

1 distinct series across 1927–1928 — each identified by its chassis and engine numbers from period factory data.
| 车型 | 车型年份 | 产量 | 底盘 | 发动机 | 变速箱 | 合计 |
|---|---|---|---|---|---|---|
| 12/55 hp Type 320 | 1927–1928 | 1927–1928 | 04 | 04 | 202 |
* 公布的产量涵盖该车型的所有系列;资料来源未作进一步细分。


The M04 as fitted to the W04.
56 PS
41 kW · 55 hp / 3,200 转/分
162 N·m
119 lb·ft / 1,200 转/分