Mercedes-Benz Ultra-Luxury Sedan · 300 SE/300 SEL
W112
Top-of-the-line fintail with air suspension.
- Production
- 1961–1965
- Built
- 6,748
- Body
- Sedan
- Chassis
- W112

The W112 was the fintail range's engineering flagship — a short-run luxury saloon that borrowed Heckflosse styling but added the technology expected of a top-tier Mercedes-Benz.
The 300 SE arrived with fuel injection and, critically, air suspension — Mercedes-Benz's first series production use of the system — along with four-wheel disc brakes and an automatic gearbox option. A long-wheelbase 300 SE L followed for buyers who wanted fintail presence with limousine accommodation.
By the end of 1965, 6,748 had been built.

Every model.
4 model designations across 1961–1965 — engines, chassis codes and production figures for the W112.
| Model | Lata modelowe | Podwozie | Silnik | Skrzynia biegów | Razem |
|---|---|---|---|---|---|
| 300 SE Sedan | 1962–1965 | 112.014 | 189.986 | uwzględnione powyżej | |
| 300 SE Sedan | 1962–1965 | 112.014 | 189.984 | 5,202 | |
| 300 SE LWB | 1963–1965 | 112.015 | 189.984 | 1,546 | |
| 300 SE LWB | 1963–1965 | 112.015 | 189.986 | uwzględnione powyżej |
* Opublikowana liczba produkcji obejmuje każdą serię tego modelu; źródło nie rozbija jej dalej.

Year by year.
The powertrain, suspension and long-wheelbase developments of the air-sprung 300 SE fintail.
- 1961
- The 300 SE debuted with air suspension and power-assisted steering as standard.
- Four-wheel disc brakes and a dual-circuit hydraulic system were standard.
- A 160 hp light-alloy M189 injection engine powered the new flagship.
- Full-length side chrome and wheel-arch trim identified the W112 body.
- 1963
- A 100 mm longer-wheelbase saloon joined the range.
- The long-wheelbase body omitted the standard car’s C-pillar vent trim.
- A four-speed manual transmission became available.
- 1964
- Higher compression and a six-plunger injection pump raised output to 170 hp.
- 1965
- Fintail saloon production ended as the W109 300 SEL succeeded it.
